Elsarticle.cls A Ation Guide

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elsarticle.cls

A better way to format your submission

1. Introduction
elsarticle.cls is a thoroughly re-written document class for formatting LATEX sub-

missions to Elsevier journals. The class uses the environments and commands
defined in LATEX kernel without any change in the signature so that clashes with
other contributed LATEX packages such as hyperref.sty, preview-latex.sty, etc., will
be minimal. elsarticle.cls is primarily built upon the default article.cls. The class
depends on the following packages for its proper functionality:
1.
2.
3.
4.
5.
6.

pifont.sty for openstar in the title footnotes;
natbib.sty for citation processing;
geometry.sty for margin settings;
fleqn.clo for left aligned equations;
graphicx.sty for graphics inclusion;

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Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

txfonts.sty optional font package, if document is to be formatted with Times

and compatible math fonts;
7. hyperref.sty optional packages if hyperlinking is required in the document.
All the above packages are part of any standard LATEX installation. Therefore, the users need not be bothered about downloading any extra packages.
Furthermore, users are free to make use of AMS math packages such as, amsmath.sty, amsthm.sty, amssymb.sty, amsfonts.sty, etc., if they want to. All these
packages work in tandem with elsarticle.cls without any problems.

2. Major Differences
Following are the major differences between elsarticle.cls and its predecessor
package, elsart.cls:

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to . elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

• elsarticle.cls is built upon article.cls while elsart.cls is not. elsart.cls redefines
many of the commands in the LATEX classes/kernel, which can possibly
cause surprising clashes with other contributed LATEX packages;
• provides preprint document formatting by default, and optionally formats
the document as per the final style of models 1+, 3+ and 5+ of Elsevier
journals;
• some easier ways for formatting list and theorem environments are provided while people can still use amsthm.sty package;
• natbib.sty is the main citation processing package which can comprehensively handle all kinds of citations and works perfectly with hyperref.sty in
combination with hypernat.sty.
• Long title pages are processed correctly in preprint and final formats.

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Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

3. Installation
The package is available at author resources page at Elsevier (http://www.
It can also be found in any of the nodes of the
Comprehensive TEX Archive Network (CTAN), one of the primary nodes being
http://tug.ctan.org/tex-archive/macros/latex/contrib/elsarticle/ Please
download the elsarticle.dtx which is the composite class with documentation and
elsarticle.ins which is the LATEX installer file. When we compile the elsarticle.ins
with LATEX it provides the class file, elsarticle.cls by stripping off all the documentation from the *.dtx file. The class may be moved or copied to a place, usually,
$TEXMF/tex/latex/elsevier/, or a folder which will be read by LATEX during document compilation. The TEX file database needs updation after moving/copying
class file. Usually, we use commands like mktexlsr or texhash depending upon
the distribution and operating system.
elsevier.com/locate/latex).

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to . elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

4. Usage
The class should be loaded with the command:
\documentclass[]{elsarticle}

where the options can be the following:
(1) preprint — default options which formats the document for submission to
Elsevier journals.
(2) review — similar to preprint option, but increases the baselineskip to facilitate easier review process.
(3) 1p — formats the article to the look and feel of the final format of model
1+ journals. This is always single column style.

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Bibliography
Final Print

(4) 3p — formats the article to the look and feel of the final format of model
3+ journals. If the journal is a two column model, use twocolumn option in
combination.
(5) 5p — formats for model 5+ journals. This is always two column style.
(6) authoryear — author-year citation style of natbib.sty. If you want to add
extra options of natbib.sty, you may use the options as a comma delimited
strings as argument to \biboptions command. An example would be:
\biboptions{longnamesfirst,angle,semicolon}

(7) number — numbered citation style.
\biboptions command.

Extra options can be loaded with

(8) sort&compress sorts and compresses the numbered citations. For example,
citation [1,2,3] will become [1–3].

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to . elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

(9) longtitle — if front matter is unusually long, use this option to split the
title page across pages with the correct placement of title and author footnotes in the first page.
(10) times — loads txfonts.sty if available in the system to use Times and compatible math fonts.
(11) All options of article.cls can be used with this document class.
(12) The default options loaded are a4paper, 10pt, oneside, onecolumn
and preprint.

5. Frontmatter
There are two types of frontmatter coding:

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(1) each author is connected to an affiliation with a footnote marker; hence all
authors are grouped together and affiliations follow;
(2) authors of same affiliations are grouped together and the relevant affiliation follows this group. An example coding of the first type is provided in
the next page.
\title{This is a specimen title\tnoteref{t1,t2}}
\tnotetext[t1]{This document is a collaborative effort.}
\tnotetext[t2]{The second title footnote which is a longer
longer than the first one and with an intention to fill
in up more than one line while formatting.}

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to . elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

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\author[rvt]{C.V.˜Radhakrishnan\corref{cor1}\fnref{fn1}}
This is a specimen titleI,II

\ead{cvr@river-valley.com}

C.V. Radhakrishnana,∗,1 , K. Bazargana,b,2 , S. Peppingc,∗∗,1,3

\author[rvt,focal]{K.˜Bazargan\fnref{fn2}}
\ead{kaveh@river-valley.com}

a River

Valley Technologies, SJP Building, Cotton Hills, Trivandrum, Kerala, India 695014
Valley Technologies, 9, Browns Court, Kennford, Exeter, United Kingdom
c Central Application Management, Elsevier, Radarweg 29, 1043 NX
Amsterdam, Netherlands

b River

\author[els]{S.˜Pepping\corref{cor2}\fnref{fn1,fn3}}
\ead[url]{http://www.elsevier.com}

\cortext[cor1]{Corresponding author}
\cortext[cor2]{Principal corresponding author}
\fntext[fn1]{This is the specimen author footnote.}
\fntext[fn2]{Another author footnote, but a little more longer.}
\fntext[fn3]{Yet another author footnote. Indeed, you can have

Abstract
In this work we demonstrate the formation of a new type of polariton on the
interface between a cuprous oxide slab and a polystyrene micro-sphere placed on
the slab. The evanescent field of the resonant whispering gallery mode (WGM)
of the micro sphere has a substantial gradient, and therefore effectively couples
with the quadrupole 1S excitons in cuprous oxide. This evanescent polariton has
a long life-time, which is determined only by its excitonic and WGM component.
The polariton lower branch has a well pronounced minimum. This suggests that
this excitation is localized and can be utilized for possible BEC. The spatial
coherence of the polariton can be improved by assembling the micro-spheres
into a linear chain.
Key words: quadrupole exciton, polariton, WGM, BEC

any number of author footnotes.}
1. Introduction

\address[rvt]{River Valley Technologies, SJP Building,
Cotton Hills, Trivandrum, Kerala, India 695014}
\address[focal]{River Valley Technologies, 9, Browns Court,
Kennford, Exeter, United Kingdom}
\address[els]{Central Application Management,
Elsevier, Radarweg 29, 1043 NX\\
Amsterdam, Netherlands}

You can see the output in the panel to the right.
Most of the commands like \title, \author, \address are self explanatory.
Various components are linked to each other by a label–reference mechanism;

Although quadrupole excitons (QE) in cuprous oxide crystals are good candidates for BEC due to their narrow line-width and long life-time there are
some factors impeding BEC Kavoulakis and Baym (1996); Roslyak and Birman
(2007). One of these factors is that due to the small but non negligible coupling
I This

document is a collaborative effort.
second title footnote which is a longer longer than the first one and with an intention
to fill in up more than one line while formatting.
∗ Corresponding author
∗∗ Principal corresponding author
Email addresses: cvr@river-valley.com (C.V. Radhakrishnan),
kaveh@river-valley.com (K. Bazargan)
URL: http://www.elsevier.com (S. Pepping)
1 This is the specimen author footnote.
2 Another author footnote, but a little more longer.
3 Yet another author footnote. Indeed, you can have any number of author footnotes.
II The

Preprint submitted to Elsevier

February 14, 2008

elsarticle.cls

A better way to format your submission

for instance, title footnote is linked to the title with a footnote mark generated by referring to the \label string of the \tnotetext. We have used similar
commands such as \tnoteref (to link title note to title); \corref (to link corresponding author text to corresponding author); \fnref (to link footnote text to
the relevant author names). TEX needs two compilations to resolve the footnote
marks in the frontmatter part. Given below are the syntax of various note marks
and note texts.

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This is a specimen titleI,II
C.V. Radhakrishnan∗,1
River Valley Technologies, SJP Building, Cotton Hills, Trivandrum, Kerala, India 695014

K. Bazargan2
River Valley Technologies, 9, Browns Court, Kennford, Exeter, United Kingdom

S. Pepping1,3
Central Application Management, Elsevier, Radarweg 29, 1043 NX
Amsterdam, Netherlands

\tnoteref{}
\corref{}
\fnref{}
\tnotetext[]{}

Abstract

\cortext[<label>]{<corresponding author note text>}

In this work we demonstrate the formation of a new type of polariton on the
interface between a cuprous oxide slab and a polystyrene micro-sphere placed on
the slab. The evanescent field of the resonant whispering gallery mode (WGM)
of the micro sphere has a substantial gradient, and therefore effectively couples
with the quadrupole 1S excitons in cuprous oxide. This evanescent polariton has
a long life-time, which is determined only by its excitonic and WGM component.
The polariton lower branch has a well pronounced minimum. This suggests that
this excitation is localized and can be utilized for possible BEC. The spatial
coherence of the polariton can be improved by assembling the micro-spheres
into a linear chain.

\fntext[<label>]{<author footnote text>}

where <label(s)> can be either one or more comma delimited label strings.
The optional arguments to the \author command holds the ref label(s) of the
address(es) to which the author is affiliated while each \address command can
have an optional argument of a label. In the same manner, \tnotetext, \fntext,
\cortext will have optional arguments as their respective labels and note text
as their mandatory argument.
The following example code provides the markup of the second type of
author-affiliation as seen in the output given in the box to the right.
\author{C.V.˜Radhakrishnan\corref{cor1}\fnref{fn1}}
\ead{cvr@river-valley.com}

Key words: quadrupole exciton, polariton, WGM, BEC

I This document is a collaborative effort.
II The second title footnote which is a longer longer than the first one and with an intention
to fill in up more than one line while formatting.
∗ Corresponding author
Email addresses: cvr@river-valley.com (C.V. Radhakrishnan),
kaveh@river-valley.com (K. Bazargan)
URL: http://www.elsevier.com (S. Pepping)
1 This is the first author footnote.
2 Another author footnote, this is a very long footnote and it should be a really long
footnote. But this footnote is not yet sufficiently long enough to make two lines of footnote
text.
3 Yet another author footnote.

\address{River Valley Technologies, SJP Building,
Cotton Hills, Trivandrum, Kerala, India 695014}

Preprint submitted to Elsevier

February 14, 2008

elsarticle.cls

A better way to format your submission

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\author{K.˜Bazargan\fnref{fn2}}
This is a specimen titleI,II

\ead{kaveh@river-valley.com}
\address{River Valley Technologies, 9, Browns Court, Kennford,
Exeter, UK.}

C.V. Radhakrishnan∗,1
River Valley Technologies, SJP Building, Cotton Hills, Trivandrum, Kerala, India 695014

K. Bazargan2

\author{S.˜Pepping\fnref{fn1,fn3}}

River Valley Technologies, 9, Browns Court, Kennford, Exeter, United Kingdom

\ead[url]{http://www.elsevier.com}

S. Pepping1,3

\address{Central Application Management,

Central Application Management, Elsevier, Radarweg 29, 1043 NX
Amsterdam, Netherlands

Elsevier, Radarweg 43, 1043 NX Amsterdam, Netherlands}
\cortext[cor1]{Corresponding author}
\fntext[fn1]{This is the first author footnote.}
\fntext[fn2]{Another author footnote, this is a very long footnote and
it should be a really long footnote. But this footnote is not yet
sufficiently long enough to make two lines of footnote text.}
\fntext[fn3]{Yet another author footnote.}

The frontmatter part has further environments such as abstract and keywords. These can be marked up in the following manner:
\begin{abstract}
In this work we demonstrate the formation of a new type of
polariton on the interface between a ....
\end{abstract}
\begin{keyword}

Abstract
In this work we demonstrate the formation of a new type of polariton on the
interface between a cuprous oxide slab and a polystyrene micro-sphere placed on
the slab. The evanescent field of the resonant whispering gallery mode (WGM)
of the micro sphere has a substantial gradient, and therefore effectively couples
with the quadrupole 1S excitons in cuprous oxide. This evanescent polariton has
a long life-time, which is determined only by its excitonic and WGM component.
The polariton lower branch has a well pronounced minimum. This suggests that
this excitation is localized and can be utilized for possible BEC. The spatial
coherence of the polariton can be improved by assembling the micro-spheres
into a linear chain.
Key words: quadrupole exciton, polariton, WGM, BEC

I This document is a collaborative effort.
II The second title footnote which is a longer longer than the first one and with an intention
to fill in up more than one line while formatting.
∗ Corresponding author
Email addresses: cvr@river-valley.com (C.V. Radhakrishnan),
kaveh@river-valley.com (K. Bazargan)
URL: http://www.elsevier.com (S. Pepping)
1 This is the first author footnote.
2 Another author footnote, this is a very long footnote and it should be a really long
footnote. But this footnote is not yet sufficiently long enough to make two lines of footnote
text.
3 Yet another author footnote.

quadruple exiton \sep polariton \sep WGM\sep BEC
\end{keyworkd}

Preprint submitted to Elsevier

February 14, 2008

elsarticle.cls

A better way to format your submission

Each keyword shall be separated by \sep command. MSC classifications shall be
provided in the keyword environment with the commands \MSC. \MSC accepts
an optional argument to accommodae future revisions. eg., \MSC[2008]. The
default is 2000.

6. Floats
Figures may be included using the command, \includegraphics in combination
with or without its several options to further control graphic. \includegraphics
is provided by graphic[s,x].sty which is part of any standard LATEX distribution.
graphicx.sty is loaded by default. LATEX accepts figures in postscript format while
pdfLATEX accepts *.pdf, *.mps (metapost), *.jpg and *.png formats. pdfLATEX does
not accept graphic files in postscript format.
The table environment is handy for marking up tabular material. If users
want to use multirow.sty, array.sty, etc., to fine control/enhance the tables, they
are welcome to load any package of their choice and elsarticle.cls will work in
combination with all loaded packages.

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Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

7. Theorem and theorem like environments
elsarticle.cls provides a few shortcuts to format theorems and theorem-like envi-

ronments with ease. In all commands the options that are used with \newtheorem
command will work exactly in the same manner. elsarticle.cls provides three commands to format theorem or theorem-like environments:
\newtheorem{thm}{Theorem}
\newtheorem{lem}[thm]{Lemma}
\newdefinition{rmk}{Remark}
\newproof{pf}{Proof}
\newproof{pot}{Proof of Theorem \ref{thm2}}

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

command formats a theorem in LATEX’s default style with italicized font, bold font for theorem heading and theorem number at the right
hand side of the theorem heading. It also optionally accepts an argument which
will be printed as an extra heading in parentheses. You may roll over your
mouse here to see how some text enclosed between \begin{thm} . . . \end{thm}
will look like.
\newdefinition command is same in all respects as its \newtheorem counterpart except that the font shape is roman instead of italic. Both \newdefinition
and \newtheorem commands automatically defines counters for the environments defined. See the output of of \begin{rmk} . . . \end{rmk}.
\newproof command is for defining proof environments with upright font
shape. No counters are defined. See the output of \begin{pot} . . . \end{pot}.
Users can also make use of amsthm.sty which will override all the default
definitions described above.

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\newtheorem














Introduction
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Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

8. Enumerated and Itemized Lists
elsarticle.cls provides an extended list processing macros which makes the usage

a bit more user friendly than the default LATEX list macros. With an optional
argument to the \begin{enumerate} command, you can change the list counter
type and its attributes.
\begin{enumerate}[1.]
\item The enumerate environment starts with an optional argument
‘1.’ so that the item counter will be suffixed by a period.
\item You can use ‘(a)’ for alphabetical counter and ’(i)’ for
roman counter.

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

\begin{enumerate}[a)]
\item Another level of list with alphabetical counter.
\item One more item before we start another.

\begin{enumerate}[(i)]
\item This item has roman numeral counter.
\item Another one before we close the third level.
\end{enumerate}
\item Third item in second level.
\end{enumerate}
\item All list items conclude with this step.
\end{enumerate}

Roll over your mouse here to see the typeset copy of the above code. Furthermore, the enhanced list environment allows one to prefix a string like ‘step’
to all the item numbers. Take a look at the example below:

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\begin{enumerate}[Step 1.]
\item This is the first step of the example list.
\item Obviously this is the second step.
\item The final step to wind up this example.
\end{enumerate}

Here is the typeset output of the above example code.

9. Cross-references
In electronic publications, articles may be internally hyperlinked. Hyperlinks
are generated from proper cross-references in the article. For example, the

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

words Fig. 1 will never be more than simple text, whereas the proper crossreference \ref{tiger} may be turned into a hyperlink to the figure itself: Fig. 1.
In the same way, the words Ref. [1] will fail to turn into a hyperlink; the proper
cross-reference is \cite{Knuth96}. Cross-referencing is possible in LATEX for sections, subsections, formulae, figures, tables, and literature references.

10. Mathematical symbols and formulae
Many physical/mathematical sciences authors require more mathematical symbols than the few that are provided in standard LATEX. A useful package for
additional symbols is the amssymb package, developed by the American Mathematical Society. This package includes such oft-used symbols as \lesssim for .,
\gtrsim for & or \hbar for ~. Note that your TEX system should have the msam
and msbm fonts installed. If you need only a few symbols, such as \Box for ,
you might try the package latexsym.
Another point which would require authors’ attention is the breaking of
longer equations. When you use elsarticle.cls for formatting your submissions
in preprint mode, the document is formatted in single column style with a text
width of 384pt or 5.3in. When this document is formatted for final print and
if the journal happens to be a double column journal, the text width will be
reduced to 224pt at for 3+ double column and 5+ journals respectively. All
the nifty fine-tuning in equation breaking done by the author goes to waste in
such cases. Therefore, authors are requested to check this problem by typesetting their submissions in final format as well just to see if their equations are
broken at appropriate places, by changing appropriate options in the document
class loading command, which is explained in section 4, Usage. This allows authors to fix any equation breaking problem before submission for publication.
elsarticle.cls supports formatting the author submission in different types of final
format. This is further discussed in section 12, Final print.

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Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

11. Bibliography
Three bibliographic style files (*.bst) are provided — elsarticle-num.bst, elsarticlenum-names.bst and elsarticle-harv.bst — the first one for the numbered scheme,
the second for the numbered with new options of natbib.sty and the last one for
the author year scheme.
In LATEX literature references are listed in the thebibliography environment.
Each reference is a \bibitem and each \bibitem is identified by a label, by which
it can be cited in the text:
\bibitem[Elson et al.(1996)]{ESG96} is cited as \citet{ESG96}.
In connection with cross-referencing and possible future hyperlinking it is not a
good idea to collect more that one literature item in one \bibitem. The so-called
Harvard or author-year style of referencing is enabled by the LATEX package
natbib. With this package the literature can be cited as follows:

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• Parenthetical: \citep{WB96} produces (Wettig & Brown, 1996).
• Textual: \citet{ESG96} produces Elson et al. (1996).

• An affix and part of a reference: \citep[e.g.][Ch. 2]{Gea97} produces
(e.g. Governato et al., 1997, Ch. 2).
In the numbered scheme of citation, \cite{<label>} is used, since \citep
or \citet has no relevance in numbered scheme. natbib package is loaded by
elsarticle with numbers as default option. You can change this to author-year or
harvard scheme by adding option authoryear in the class loading command. If
you want to use more options of the natbib package, you can do so with the
\biboptions command, which is described in section 4, Usage. For details of
various options of the natbib package, please take a look at the natbib documentation, which is part of any standard LATEX installation.
In addition to the above standard .bst files, there are 10 journal-specific
.bst files also available. Instruction for using these .bst files can be found at
http://support.river-valley.com

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

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Displayed equations and double column journals
Many Elsevier journals print their text in two columns. Because the preprint
To calculate
interaction
of thethan
plane
wavecolumns,
(conventional
polariton)are
(1) too
and wide
layout
uses athe
larger
line width
such
the formulas
WGM
(evanescent
polariton)
with
cuprous
oxide
one
has
to
change
to
the 6)
for the line width in print. Here is an example of an equation (see equation
cuprous oxide centered system of coordinate (See Fig.2) While in the system
which is perfect in single column preprint format:
of the coordinate, centered at the cuprous oxide, the plane wave is still given by
the expression (1), the scattered field has to be changed according to the vector
Clip 1: Seeharmonic
equation addition
(6).
spherical
theorem Stein (1961):
ml
M1,39 = Aml
1,39 (r0 + δr) Mml + B1,39 (r0 + δr) Nml

(4)

ml
Here Aml
1,39 and B1,39 are the translational coefficients. Their explicit expression
can be found, for instance, in Fuller (1991); Miyazaki and Jimba (2000) and are
explicitly listed in the Appendix.
The bulk (incident) and evanescent polaritons in cuprous oxide are formed
through the quadrupole part of the light-matter interaction:
ml
M1,39 = Aml
1,39 (r0 + δr) Mml + B1,39 (r0 + δr) Nml














Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

(5)

Here e, m are the electron charge and mass; p is the electron momentum. For
the quadrupole 1S transition in cuprous oxide the energy of interaction can be
written as:
Z
Z
Z
∞
X
Gn (x, y)
Fn (x)
Gn (x, y)
+
(6)
An dx
= B n C n dx dy
A
+
B
A
x
+
B
y
A
x
+
B
y
n
n
n
n
n
n
i=0
Here we introduced the initial state of the system, which transforms as irreducible representation 1 Γ+
1 of the cubic centered group Oh . The final state is
When
this document
is typeset
for publication
in a model 3+ journal with douthe ortho-exciton
state
which transforms
as 3 Γ+
5,xz in Cartesian system or as
ble
columns,
equation spherical
will overlap
3 +
Γ5;1,2
in the the
corresponding
basis.the second column text matter if the
equation
is using
not broken
location.
Hence,
(1, 3, 4,at
6),the
oneappropriate
can deduce that
the the coupling of the spherical
harmonic compared to the plane wave (h̄g1,2 = 124 µeV ) is resonantly enhanced:
g1,39
= −i0.06b1,39 (kr0 ) A1,2
1,39 (r0 + δr)
g1,2

(7)

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

A better way to format your submission

Clip 2: See equation (6) overprints into second column.
Fuller (1991); Miyazaki and Jimba (2000) and are explicitly listed in the Appendix.
The bulk (incident) and evanescent polaritons in
cuprous oxide are formed through the quadrupole part
of the light-matter interaction:
ml
M1,39 = Aml
1,39 (r0 + δr) Mml + B1,39 (r0 + δr) Nml

(5)

penetrating into cuprous oxide, although the coupling
grows with mode number l, because the gradient of the
evanescent field increases. Note that QE realizes strong
coupling regime g1,39 > γ while DE demonstrates weak
regime only Xudong Fan (1999). The property of the
scalable coupling factor can be utilized in practical applications such as non-linear optics and is the subject of
our future work.

Here e, m are the electron charge and mass; p is the electron momentum. For the quadrupole 1S transition in
3. Results and discussion
cuprous oxide the energy of interaction can be written
as:
In this section let us utilize the above calculated
Z
Z
Z
∞
X
Fn (x)
Gn (x, y)
Gn (x,
y)
WGM-QE
interaction to obtain the evanescent polariton
n
n n
dx
A
dx
dy
+
=BC
(EP)
dispersion in the framework of the coupled oscillaA
+
B
A
x
+
B
y
A
x
+
B
y
n
n
n
n
n
n
i=0
tor model that has been widely used for describing cou(6)
pled atom-photon or exciton-photon modes in microHere we introduced the initial state of the system, which
cavity systems Carmichael (1986). Near the resonance
transforms as irreducible representation 1 Γ+1 of the cubic
between WGM and the quadrupole exciton ω1l ≈ ω1S
centered group Oh . The final state is the ortho-exciton
the EP branches are given by the eigenvalues of the folstate which transforms as 3 Γ+5,xz in Cartesian system or
lowing Hamiltonian:
as 3 Γ+5;1,2 in the corresponding spherical basis.
TheHence,
typesetter
will try to break the equation which need not necessarily
be

 †
using (1, 3, 4, 6), one can deduce that the
†
†
†
(x)
H/~
=
ω
a
a
+
ω
b
b
+
g
a
b
+
a
b
,
(8)
1l
x
1S
x
1l
x
x
x
x
x
k
to the
the
liking
the author
or as to
it the
happens, typesetter’s break point
may be
coupling
of theof
spherical
harmonic compared
plane wave (~g1,2incorrect.
= 124 µeV) is resonantly
enhanced:
semantically
Therefore,
authorshere
may
check
their
submissions
the
a x , b x are annihilation operators for light for
and the
exciton,
respectively.
We
also
neglected
kinetic
energy
g
1,39
incidence of= −i0.06b
such 1,39
long
and
the equations at the correct places
(kr0 )equations
(r
A1,2
(7) break
1,39 0 + δr)
of the QE due to smallness of the resonant wave vecg1,2
so that the final typeset copy will be as they
wish.
tor and
big mass of the QE. Therefore, considering that
1,2
both the exciton and WGM of a single sphere are localHere we utilized the fact that B1,2
1,39  A1,39 . While the
ized, the dispersion is reduced to:
resonant enhancement is provided by the b1,39 Mie coefficient here, the translational coefficient reduces the
ω = ω1S ± g1l /~
(9)
effect. That is why if one tries to couple the evanescent
light to the dipole transition the effect is much weaker as
1,2
The above expression shows the formation of the douA0,1
1,39  A1,39 . The resulting exciton - evanescent light
bletpage
at resonance
are exactly
Authors
can
format
their
submission
to
the
size(both
andstates
margins
ofhalf-QE,
theirhalfprecoupling is shown in Fig.1 Both dipole and quadrupole
WGM). Recall that for DE-WGM weak coupling only
ferred journal. elsarticle provides four classWGM
options
for the same:
pattern shifted by the coupling has been observed
Xudong Fan (1999).
1p: 1+ journals with a text area of 384pt
562pt
or 13.5cm
× 19.75cm
The×excitons
are trapped
in the minimum
of the loweror
5.3in × 7.78in, single column stylebranch
only.thus populating the strongly localized states.
Physically this means that the resonant coupling with
localized WGM does not let QE escape by means of its
kinetic energy.
The dispersion above is similar to the quadrupoledipole hybrid in the organic-inorganic hetero-structures

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12. Final print

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls
3p:
3pd:
5p:

A better way to format your submission

3+ journals with a text area of 468pt × 622pt or 16.45cm × 21.9cm or
6.5in × 8.6in, single column style.
3+ with the same text area as above, double column style.

5+ with text area of 522pt × 682pt or 18.35cm × 24cm or 7.22in ×
9.45in, double column style only.

Following pages have the clippings of different parts of the first page of
different journal models typeset in final format.
Clip 3: Upper part of first page of a single column article.

This is a specimen titleI,II
C.V. Radhakrishnana,∗,1 , K. Bazargana,b,2 , S. Peppingc,∗∗,1,3
a River

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Valley Technologies, SJP Building, Cotton Hills, Trivandrum, Kerala, India 695014
Valley Technologies, 9, Browns Court, Kennford, Exeter, United Kingdom
c Central Application Management, Elsevier, Radarweg 29, 1043 NX
Amsterdam, Netherlands

b River

Abstract
In this work we demonstrate the formation of a new type of polariton on the interface between
a cuprous oxide slab and a polystyrene micro-sphere placed on the slab. The evanescent field of
the resonant whispering gallery mode (WGM) of the micro sphere has a substantial gradient, and
therefore effectively couples with the quadrupole 1S excitons in cuprous oxide. This evanescent
polariton has a long life-time, which is determined only by its excitonic and WGM component.
The polariton lower branch has a well pronounced minimum. This suggests that this excitation
is localized and can be utilized for possible BEC. The spatial coherence of the polariton can be
improved by assembling the micro-spheres into a linear chain.
Key words: quadrupole exciton, polariton, WGM, BEC

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

Abstract
In this work we demonstrate the formation of a new type of polariton on the interface between
a cuprous oxide slab and a polystyrene micro-sphere placed on the slab. The evanescent field of
the resonant whispering gallery mode (WGM)A
of better
the microway
sphereto
hasformat
a substantial
gradient,
and
your
submission
therefore effectively couples with the quadrupole 1S excitons in cuprous oxide. This evanescent
polariton has a long life-time, which is determined only by its excitonic and WGM component.
The polariton lower branch has a well pronounced minimum. This suggests that this excitation
is localized and can be utilized for possible BEC. The spatial coherence of the polariton can be
improved
by assembling
the micro-spheres
into acolumn
linear chain.
Clip
4: Lower
part of first
page of a single
article.

elsarticle.cls

Key words: quadrupole exciton, polariton, WGM, BEC

1. Introduction
Although quadrupole excitons (QE) in cuprous oxide crystals are good candidates for BEC
due to their narrow line-width and long life-time there are some factors impeding BEC Kavoulakis
and Baym (1996); Roslyak and Birman (2007). One of these factors is that due to the small but
non negligible coupling to the photon bath, one must consider BEC of the corresponding mixed
light-matter states called polaritons Frohlich et al. (2005). The photon-like part of the polariton
has a large group velocity and tends to escape from the crystal. Thus, the temporal coherence of
the condensate is effectively broken Ell et al. (1998); Snoke (2002). One proposed solution to

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Frontmatter
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Final Print

I This

document is a collaborative effort.
second title footnote which is a longer longer than the first one and with an intention to fill in up more than one
line while formatting.
∗ Corresponding author
∗∗ Principal corresponding author
Email addresses: cvr@river-valley.com (C.V. Radhakrishnan), kaveh@river-valley.com (K. Bazargan)
URL: http://www.elsevier.com (S. Pepping)
1 This is the specimen author footnote.
2 Another author footnote, but a little more longer.
3 Yet another author footnote. Indeed, you can have any number of author footnotes.
II The

Preprint submitted to Elsevier

February 14, 2008

Model 1+ and 3+ will have the same look and feel in the typeset copy when
presented in this document. That is also the case with the double column 3+
and 5+ journal article pages. The only difference will be wider text width of
higher models. Therefore we will look at the different portions of a typical
single column journal page and that of a double column article in the final
format.

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

elsarticle.cls

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Clip 5: Upper part of first page of a typical double column article.

This is a specimen titleI,II
C.V. Radhakrishnana,∗,1 , K. Bazargana,b,2 , S. Peppingc,∗∗,1,3
a River

Valley Technologies, SJP Building, Cotton Hills, Trivandrum, Kerala, India 695014
Valley Technologies, 9, Browns Court, Kennford, Exeter, United Kingdom
c Central Application Management, Elsevier, Radarweg 29, 1043 NX
Amsterdam, Netherlands

b River

Abstract
In this work we demonstrate the formation of a new type of polariton on the interface between a cuprous oxide slab and
a polystyrene micro-sphere placed on the slab. The evanescent field of the resonant whispering gallery mode (WGM)
of the micro sphere has a substantial gradient, and therefore effectively couples with the quadrupole 1S excitons
in cuprous oxide. This evanescent polariton has a long life-time, which is determined only by its excitonic and
WGM component. The polariton lower branch has a well pronounced minimum. This suggests that this excitation is
localized and can be utilized for possible BEC. The spatial coherence of the polariton can be improved by assembling
the micro-spheres into a linear chain.














Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

Key words: quadrupole exciton, polariton, WGM, BEC

1. Introduction
Although quadrupole excitons (QE) in cuprous oxide
crystals are good candidates for BEC due to their narrow line-width and long life-time there are some factors
impeding BEC Kavoulakis and Baym (1996); Roslyak
and Birman (2007). One of these factors is that due
to the small but non negligible coupling to the photon bath, one must consider BEC of the corresponding mixed light-matter states called polaritons Frohlich
et al. (2005). The photon-like part of the polariton has a
large group velocity and tends to escape from the crystal. Thus, the temporal coherence of the condensate is
effectively broken Ell et al. (1998); Snoke (2002). One
I This

document is a collaborative effort.
second title footnote which is a longer longer than the first
one and with an intention to fill in up more than one line while formatting.
∗ Corresponding author
II The

proposed solution to this issue is to place the crystal into
a planar micro-cavity Kasprzak et al. (2006). But even
state-of-the-art planar micro-cavities can hold the light
no longer than 10 µs. Besides, formation of the polaritons in the planar cuprous oxide micro-cavity is not effective due to quadrupole origin of the excitons.
Therefore in this work we propose to prevent the polariton escaping by trapping it into a whispering gallery
mode (WGM)4 of a polystyrene micro-sphere (PMS).
We develop a model which demonstrates formation of a strongly localized polariton-like quasi-particle.
This quasi-particle is formed by the resonant interaction
between the WGM in PMS and QE in the adjacent layer
of cuprous oxide. The QE interacts with the gradient of
the WGM evanescent field.
There are few experiments concerned with resonant
interaction of the WGM and dipole allowed exciton
(DE) Xudong Fan (1999); Fan et al. (1999). But the DE
has some disadvantages compared to QE when it comes

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

This is a specimen titleI,II

elsarticle.cls

A better way to format your submission

C.V. Radhakrishnana,∗,1 , K. Bazargana,b,2 , S. Peppingc,∗∗,1,3

HOME

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RESOURCES

a River

Valley Technologies, SJP Building, Cotton Hills, Trivandrum, Kerala, India 695014
b River Valley Technologies, 9, Browns Court, Kennford, Exeter, United Kingdom
c Central Application Management, Elsevier, Radarweg 29, 1043 NX
Amsterdam, Netherlands

Clip 6: Lower part of first page a typical double column article.
Abstract
In this work we demonstrate the formation of a new type of polariton on the interface between a cuprous oxide slab and
a polystyrene micro-sphere placed on the slab. The evanescent field of the resonant whispering gallery mode (WGM)
of the micro sphere has a substantial gradient, and therefore effectively couples with the quadrupole 1S excitons
in cuprous oxide. This evanescent polariton has a long life-time, which is determined only by its excitonic and
WGM component. The polariton lower branch has a well pronounced minimum. This suggests that this excitation is
localized and can be utilized for possible BEC. The spatial coherence of the polariton can be improved by assembling
the micro-spheres into a linear chain.
Key words: quadrupole exciton, polariton, WGM, BEC

1. Introduction
Although quadrupole excitons (QE) in cuprous oxide
crystals are good candidates for BEC due to their narrow line-width and long life-time there are some factors
impeding BEC Kavoulakis and Baym (1996); Roslyak
and Birman (2007). One of these factors is that due
to the small but non negligible coupling to the photon bath, one must consider BEC of the corresponding mixed light-matter states called polaritons Frohlich
et al. (2005). The photon-like part of the polariton has a
large group velocity and tends to escape from the crystal. Thus, the temporal coherence of the condensate is
effectively broken Ell et al. (1998); Snoke (2002). One
I This

document is a collaborative effort.
second title footnote which is a longer longer than the first
one and with an intention to fill in up more than one line while formatting.
∗ Corresponding author
∗∗ Principal corresponding author
Email addresses: cvr@river-valley.com
(C.V. Radhakrishnan), kaveh@river-valley.com (K. Bazargan)
URL: http://www.elsevier.com (S. Pepping)
1 This is the specimen author footnote.
2 Another author footnote, but a little more longer.
3 Yet another author footnote. Indeed, you can have any number of
author footnotes.
Preprint submitted to Elsevier
II The

proposed solution to this issue is to place the crystal into
a planar micro-cavity Kasprzak et al. (2006). But even
state-of-the-art planar micro-cavities can hold the light
no longer than 10 µs. Besides, formation of the polaritons in the planar cuprous oxide micro-cavity is not effective due to quadrupole origin of the excitons.
Therefore in this work we propose to prevent the polariton escaping by trapping it into a whispering gallery
mode (WGM)4 of a polystyrene micro-sphere (PMS).
We develop a model which demonstrates formation of a strongly localized polariton-like quasi-particle.
This quasi-particle is formed by the resonant interaction
between the WGM in PMS and QE in the adjacent layer
of cuprous oxide. The QE interacts with the gradient of
the WGM evanescent field.
There are few experiments concerned with resonant
interaction of the WGM and dipole allowed exciton
(DE) Xudong Fan (1999); Fan et al. (1999). But the DE
has some disadvantages compared to QE when it comes
to interaction with the WGM. First, the evanescent light
has small intensity. Therefore it is not effective for the
4 WGM occur at particular resonant wavelengths of light for a
given dielectric sphere size. At these wavelengths, the light undergoes total internal reflection at the sphere surface and becomes trapped
within the particle for timescales of the order of ns.
February 14, 2008














Introduction
Major Differences
Installation
Usage
Frontmatter
Floats
Theorems
Lists
Cross-references
Mathematical Symbols and Formulae
Bibliography
Final Print

c 2009, Elsevier Ltd. Bugs, feature requests, suggestions and comments shall be mailed to <elsarticle@river-valley.com>. elsarticle.
[dtx,ins], related documentation and supporting packages are released
under LATEX Project Public Licence, either version 1.2 or any later version. This work has the LPPL maintenance status ‘author-maintained’.

</pre><hr>Source Exif Data: <br /><pre>File Type                       : PDF
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