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Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling

With the advent of new nanomanufacturing techniques has come the rise of the field of nanophotonics and an increased need to determine optical properties of novel structures. Commercial software packages are able to estimate the behavior, but require large resources and heavy computational time. By...

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Autores principales: Lattery, Dustin M., Kim, Mingeon, Choi, Jongin, Lee, Bong Jae, Wang, Xiaojia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6141545/
https://www.ncbi.nlm.nih.gov/pubmed/30224764
http://dx.doi.org/10.1038/s41598-018-32265-w
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author Lattery, Dustin M.
Kim, Mingeon
Choi, Jongin
Lee, Bong Jae
Wang, Xiaojia
author_facet Lattery, Dustin M.
Kim, Mingeon
Choi, Jongin
Lee, Bong Jae
Wang, Xiaojia
author_sort Lattery, Dustin M.
collection PubMed
description With the advent of new nanomanufacturing techniques has come the rise of the field of nanophotonics and an increased need to determine optical properties of novel structures. Commercial software packages are able to estimate the behavior, but require large resources and heavy computational time. By combining coordinate transforms and Effective Medium Theory (EMT), an effective relative permittivity tensor is defined and further exploited to calculate the polarization-coupled Fresnel coefficients through Maxwell’s equations. A uniaxial simplification is made to show the case of tilted nanorod arrays. To demonstrate the flexibility of this system, the interfacial reflectance has been calculated for both s- and p-polarizations as well as the coupled case with the volume filling fractions of f = 0.10 and 0.30 for silver (Ag) and titanium (Ti) nanorods, and a scenario of a Ag nanorod array with polymethyl methacrylate (PMMA) as the surrounding medium. The exact results computed by the finite-difference time-domain method justify the validity of EMT with polarization coupling taken into account. The effects of incidence angle and azimuthal angle on reflectance are also discussed. The relatively simple nature of this approach allows for fast estimations of the optical properties of various nanostructures.
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spelling pubmed-61415452018-09-20 Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling Lattery, Dustin M. Kim, Mingeon Choi, Jongin Lee, Bong Jae Wang, Xiaojia Sci Rep Article With the advent of new nanomanufacturing techniques has come the rise of the field of nanophotonics and an increased need to determine optical properties of novel structures. Commercial software packages are able to estimate the behavior, but require large resources and heavy computational time. By combining coordinate transforms and Effective Medium Theory (EMT), an effective relative permittivity tensor is defined and further exploited to calculate the polarization-coupled Fresnel coefficients through Maxwell’s equations. A uniaxial simplification is made to show the case of tilted nanorod arrays. To demonstrate the flexibility of this system, the interfacial reflectance has been calculated for both s- and p-polarizations as well as the coupled case with the volume filling fractions of f = 0.10 and 0.30 for silver (Ag) and titanium (Ti) nanorods, and a scenario of a Ag nanorod array with polymethyl methacrylate (PMMA) as the surrounding medium. The exact results computed by the finite-difference time-domain method justify the validity of EMT with polarization coupling taken into account. The effects of incidence angle and azimuthal angle on reflectance are also discussed. The relatively simple nature of this approach allows for fast estimations of the optical properties of various nanostructures. Nature Publishing Group UK 2018-09-17 /pmc/articles/PMC6141545/ /pubmed/30224764 http://dx.doi.org/10.1038/s41598-018-32265-w Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lattery, Dustin M.
Kim, Mingeon
Choi, Jongin
Lee, Bong Jae
Wang, Xiaojia
Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling
title Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling
title_full Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling
title_fullStr Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling
title_full_unstemmed Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling
title_short Effective Radiative Properties of Tilted Metallic Nanorod Arrays Considering Polarization Coupling
title_sort effective radiative properties of tilted metallic nanorod arrays considering polarization coupling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6141545/
https://www.ncbi.nlm.nih.gov/pubmed/30224764
http://dx.doi.org/10.1038/s41598-018-32265-w
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