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Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals

We investigate the surface plasmon polariton dispersion and optical spectra of a thin film of tilted Weyl semimetal. Tilted Weyl semimetals possess tilted Weyl cones at the Weyl nodes and are categorized to type-I with closed Fermi surfaces and type-II with overtilted Weyl cones and open Fermi surfa...

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Autores principales: Abdol, Somayeh Oskoui, Abdollahipour, Babak
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322404/
https://www.ncbi.nlm.nih.gov/pubmed/34326394
http://dx.doi.org/10.1038/s41598-021-94808-y
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author Abdol, Somayeh Oskoui
Abdollahipour, Babak
author_facet Abdol, Somayeh Oskoui
Abdollahipour, Babak
author_sort Abdol, Somayeh Oskoui
collection PubMed
description We investigate the surface plasmon polariton dispersion and optical spectra of a thin film of tilted Weyl semimetal. Tilted Weyl semimetals possess tilted Weyl cones at the Weyl nodes and are categorized to type-I with closed Fermi surfaces and type-II with overtilted Weyl cones and open Fermi surfaces. We find that the surface plasmon polariton dispersion of this system is nonreciprocal even in the absence of the external magnetic field. Moreover, we demonstrate that the tilt parameter has a profound effect in controlling this nonreciprocity. We reveal that the thin film of type-II Weyl semimetal hosts the surface plasmon polariton modes with the negative group velocity. Furthermore, we show that the angular optical spectra of this structure are highly asymmetric and this angular asymmetry in the absorptivity and reflectivity depends profoundly on the tilt parameter of the tilted Weyl semimetal. These exciting features propose employing the tilted Weyl semimetals in optical sensing devices, optical data storage, and devices for quantum information processing.
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spelling pubmed-83224042021-07-30 Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals Abdol, Somayeh Oskoui Abdollahipour, Babak Sci Rep Article We investigate the surface plasmon polariton dispersion and optical spectra of a thin film of tilted Weyl semimetal. Tilted Weyl semimetals possess tilted Weyl cones at the Weyl nodes and are categorized to type-I with closed Fermi surfaces and type-II with overtilted Weyl cones and open Fermi surfaces. We find that the surface plasmon polariton dispersion of this system is nonreciprocal even in the absence of the external magnetic field. Moreover, we demonstrate that the tilt parameter has a profound effect in controlling this nonreciprocity. We reveal that the thin film of type-II Weyl semimetal hosts the surface plasmon polariton modes with the negative group velocity. Furthermore, we show that the angular optical spectra of this structure are highly asymmetric and this angular asymmetry in the absorptivity and reflectivity depends profoundly on the tilt parameter of the tilted Weyl semimetal. These exciting features propose employing the tilted Weyl semimetals in optical sensing devices, optical data storage, and devices for quantum information processing. Nature Publishing Group UK 2021-07-29 /pmc/articles/PMC8322404/ /pubmed/34326394 http://dx.doi.org/10.1038/s41598-021-94808-y Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Abdol, Somayeh Oskoui
Abdollahipour, Babak
Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals
title Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals
title_full Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals
title_fullStr Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals
title_full_unstemmed Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals
title_short Asymmetrical plasmonic absorber and reflector based on tilted Weyl semimetals
title_sort asymmetrical plasmonic absorber and reflector based on tilted weyl semimetals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8322404/
https://www.ncbi.nlm.nih.gov/pubmed/34326394
http://dx.doi.org/10.1038/s41598-021-94808-y
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