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In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth

[Image: see text] An in situ transmission-based system has been designed to optically monitor the ellipsometry constants of a hyperbolic plasmonic metamaterial during electrochemical growth. The metamaterial, made from an array of vertically aligned gold nanorods, has demonstrated an unprecedented a...

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Autores principales: Morgan, Frances, Murphy, Antony, Hendren, William, Wurtz, Gregory, Pollard, Robert J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2017
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5460957/
https://www.ncbi.nlm.nih.gov/pubmed/28475839
http://dx.doi.org/10.1021/acsami.7b04129
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author Morgan, Frances
Murphy, Antony
Hendren, William
Wurtz, Gregory
Pollard, Robert J.
author_facet Morgan, Frances
Murphy, Antony
Hendren, William
Wurtz, Gregory
Pollard, Robert J.
author_sort Morgan, Frances
collection PubMed
description [Image: see text] An in situ transmission-based system has been designed to optically monitor the ellipsometry constants of a hyperbolic plasmonic metamaterial during electrochemical growth. The metamaterial, made from an array of vertically aligned gold nanorods, has demonstrated an unprecedented ability to manipulate the polarization of light using subwavelength thickness slabs, making in situ ellipsometric data a powerful tool in the controlled design of such components. In this work, we show practical proof-of-principle of this design method and rationalize the ellipsometric output on the basis of the modal properties of the nanorod metamaterial. The real-time optical monitoring setup provides excellent control and repeatability of nanostructure growth for the design of future ultrathin optical components. The performance of the ellipsometric method was also tested as a refractive index sensor. Monitoring refractive index changes near the metamaterial’s epsilon near zero (ENZ) frequency showed a sensitivity on the order of 500°/RIU in the ellipsometric phase for a metamaterial that shows 250 nm/RIU sensitivity in its extinction.
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spelling pubmed-54609572017-06-08 In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth Morgan, Frances Murphy, Antony Hendren, William Wurtz, Gregory Pollard, Robert J. ACS Appl Mater Interfaces [Image: see text] An in situ transmission-based system has been designed to optically monitor the ellipsometry constants of a hyperbolic plasmonic metamaterial during electrochemical growth. The metamaterial, made from an array of vertically aligned gold nanorods, has demonstrated an unprecedented ability to manipulate the polarization of light using subwavelength thickness slabs, making in situ ellipsometric data a powerful tool in the controlled design of such components. In this work, we show practical proof-of-principle of this design method and rationalize the ellipsometric output on the basis of the modal properties of the nanorod metamaterial. The real-time optical monitoring setup provides excellent control and repeatability of nanostructure growth for the design of future ultrathin optical components. The performance of the ellipsometric method was also tested as a refractive index sensor. Monitoring refractive index changes near the metamaterial’s epsilon near zero (ENZ) frequency showed a sensitivity on the order of 500°/RIU in the ellipsometric phase for a metamaterial that shows 250 nm/RIU sensitivity in its extinction. American Chemical Society 2017-05-05 2017-05-24 /pmc/articles/PMC5460957/ /pubmed/28475839 http://dx.doi.org/10.1021/acsami.7b04129 Text en Copyright © 2017 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Morgan, Frances
Murphy, Antony
Hendren, William
Wurtz, Gregory
Pollard, Robert J.
In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
title In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
title_full In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
title_fullStr In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
title_full_unstemmed In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
title_short In Situ Ellipsometric Monitoring of Gold Nanorod Metamaterials Growth
title_sort in situ ellipsometric monitoring of gold nanorod metamaterials growth
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5460957/
https://www.ncbi.nlm.nih.gov/pubmed/28475839
http://dx.doi.org/10.1021/acsami.7b04129
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