Cargando…
Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial
Noble Metals such as Gold and Silver demonstrated for mid IR metamaterials have suffered many obstacles such as: high losses and lack of tunability. The application of doped semiconductors has allowed overcoming the tunability restriction, besides, possessing lower losses as compared to metals. In a...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5681669/ https://www.ncbi.nlm.nih.gov/pubmed/29127383 http://dx.doi.org/10.1038/s41598-017-15493-4 |
_version_ | 1783277954613116928 |
---|---|
author | Desouky, Mai Mahmoud, Ahmed M. Swillam, Mohamed A. |
author_facet | Desouky, Mai Mahmoud, Ahmed M. Swillam, Mohamed A. |
author_sort | Desouky, Mai |
collection | PubMed |
description | Noble Metals such as Gold and Silver demonstrated for mid IR metamaterials have suffered many obstacles such as: high losses and lack of tunability. The application of doped semiconductors has allowed overcoming the tunability restriction, besides, possessing lower losses as compared to metals. In addition, doped semiconductors have small magnitude of negative real permittivity which is required to realize mid IR Hyperbolic Metamaterials (HMMs). We theoretically demonstrate super focusing based on an all Semiconductor planar HMM using InAs heterostructure. By applying a single slit integrated with doped InAs/InAs HMM, incident light can be coupled to high propagation wave vectors of the HMM modes leading to sub diffraction focusing within the mid IR wave length range. Our proposed structure shows a wide controllable/ tunable operation by changing the doping concentration of InAs. As a consequence, focusing resolution can be tuned over the mid IR ranging from 4.64 μm to 19.57 μm with the maximum achieved resolution is up to 0.045λ at an operating wavelength of 19.57 μm. In addition, we show the effect of substrate refractive index on tuning and enhancing the focusing resolution. Our proposed HMM is an all single based material in which it will not suffer lattice mismatch restrictions during fabrication. |
format | Online Article Text |
id | pubmed-5681669 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56816692017-11-17 Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial Desouky, Mai Mahmoud, Ahmed M. Swillam, Mohamed A. Sci Rep Article Noble Metals such as Gold and Silver demonstrated for mid IR metamaterials have suffered many obstacles such as: high losses and lack of tunability. The application of doped semiconductors has allowed overcoming the tunability restriction, besides, possessing lower losses as compared to metals. In addition, doped semiconductors have small magnitude of negative real permittivity which is required to realize mid IR Hyperbolic Metamaterials (HMMs). We theoretically demonstrate super focusing based on an all Semiconductor planar HMM using InAs heterostructure. By applying a single slit integrated with doped InAs/InAs HMM, incident light can be coupled to high propagation wave vectors of the HMM modes leading to sub diffraction focusing within the mid IR wave length range. Our proposed structure shows a wide controllable/ tunable operation by changing the doping concentration of InAs. As a consequence, focusing resolution can be tuned over the mid IR ranging from 4.64 μm to 19.57 μm with the maximum achieved resolution is up to 0.045λ at an operating wavelength of 19.57 μm. In addition, we show the effect of substrate refractive index on tuning and enhancing the focusing resolution. Our proposed HMM is an all single based material in which it will not suffer lattice mismatch restrictions during fabrication. Nature Publishing Group UK 2017-11-10 /pmc/articles/PMC5681669/ /pubmed/29127383 http://dx.doi.org/10.1038/s41598-017-15493-4 Text en © The Author(s) 2017 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 Desouky, Mai Mahmoud, Ahmed M. Swillam, Mohamed A. Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial |
title | Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial |
title_full | Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial |
title_fullStr | Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial |
title_full_unstemmed | Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial |
title_short | Tunable Mid IR focusing in InAs based semiconductor Hyperbolic Metamaterial |
title_sort | tunable mid ir focusing in inas based semiconductor hyperbolic metamaterial |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5681669/ https://www.ncbi.nlm.nih.gov/pubmed/29127383 http://dx.doi.org/10.1038/s41598-017-15493-4 |
work_keys_str_mv | AT desoukymai tunablemidirfocusingininasbasedsemiconductorhyperbolicmetamaterial AT mahmoudahmedm tunablemidirfocusingininasbasedsemiconductorhyperbolicmetamaterial AT swillammohameda tunablemidirfocusingininasbasedsemiconductorhyperbolicmetamaterial |