Plasmonics of topological insulators at optical frequencies

The development of nanoplasmonic devices, such as plasmonic circuits and metamaterial superlenses in the visible to ultraviolet frequency range, is hampered by the lack of low-loss plasmonic media. Recently, strong plasmonic response was reported in a certain class of topological insulators. Here, w...

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Main Authors: Yin, Jun, Adamo, Giorgio, Chong, Yidong, Soci, Cesare, Krishnamoorthy, Harish Natarajan Swaha, Dubrovkin, Alexander M., Zheludev, Nikolay I.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/88516
http://hdl.handle.net/10220/45817
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-885162023-02-28T19:35:30Z Plasmonics of topological insulators at optical frequencies Yin, Jun Adamo, Giorgio Chong, Yidong Soci, Cesare Krishnamoorthy, Harish Natarajan Swaha Dubrovkin, Alexander M. Zheludev, Nikolay I. School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Plasmonics Topological Insulators DRNTU::Science::Physics The development of nanoplasmonic devices, such as plasmonic circuits and metamaterial superlenses in the visible to ultraviolet frequency range, is hampered by the lack of low-loss plasmonic media. Recently, strong plasmonic response was reported in a certain class of topological insulators. Here, we present a first-principles density functional theory analysis of the dielectric functions of topologically insulating quaternary (Bi,Sb)2(Te,Se)3 trichalcogenide compounds. Bulk plasmonic properties, dominated by interband transitions, are observed from 2 to 3 eV and extend to higher frequencies. Moreover, trichalcogenide compounds are better plasmonic media than gold and silver at blue and UV wavelengths. By analyzing thin slabs, we also show that these materials exhibit topologically protected surface states, which are capable of supporting propagating plasmon polariton modes over an extremely broad spectral range, from the visible to the mid-infrared and beyond, owing to a combination of inter- and intra-surface band transitions. MOE (Min. of Education, S’pore) Published version 2018-09-05T02:21:47Z 2019-12-06T17:05:01Z 2018-09-05T02:21:47Z 2019-12-06T17:05:01Z 2017 Journal Article Yin, J., Krishnamoorthy, H. N. S., Adamo, G., Dubrovkin, A. M., Chong, Y., Zheludev, N. I., & Soci, C. (2017). Plasmonics of topological insulators at optical frequencies. NPG Asia Materials, 9(8), e425-. doi:10.1038/am.2017.149 1884-4049 https://hdl.handle.net/10356/88516 http://hdl.handle.net/10220/45817 10.1038/am.2017.149 en NPG Asia Materials © 2017 The Author(s) (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ 8 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Plasmonics
Topological Insulators
DRNTU::Science::Physics
spellingShingle Plasmonics
Topological Insulators
DRNTU::Science::Physics
Yin, Jun
Adamo, Giorgio
Chong, Yidong
Soci, Cesare
Krishnamoorthy, Harish Natarajan Swaha
Dubrovkin, Alexander M.
Zheludev, Nikolay I.
Plasmonics of topological insulators at optical frequencies
description The development of nanoplasmonic devices, such as plasmonic circuits and metamaterial superlenses in the visible to ultraviolet frequency range, is hampered by the lack of low-loss plasmonic media. Recently, strong plasmonic response was reported in a certain class of topological insulators. Here, we present a first-principles density functional theory analysis of the dielectric functions of topologically insulating quaternary (Bi,Sb)2(Te,Se)3 trichalcogenide compounds. Bulk plasmonic properties, dominated by interband transitions, are observed from 2 to 3 eV and extend to higher frequencies. Moreover, trichalcogenide compounds are better plasmonic media than gold and silver at blue and UV wavelengths. By analyzing thin slabs, we also show that these materials exhibit topologically protected surface states, which are capable of supporting propagating plasmon polariton modes over an extremely broad spectral range, from the visible to the mid-infrared and beyond, owing to a combination of inter- and intra-surface band transitions.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Yin, Jun
Adamo, Giorgio
Chong, Yidong
Soci, Cesare
Krishnamoorthy, Harish Natarajan Swaha
Dubrovkin, Alexander M.
Zheludev, Nikolay I.
format Article
author Yin, Jun
Adamo, Giorgio
Chong, Yidong
Soci, Cesare
Krishnamoorthy, Harish Natarajan Swaha
Dubrovkin, Alexander M.
Zheludev, Nikolay I.
author_sort Yin, Jun
title Plasmonics of topological insulators at optical frequencies
title_short Plasmonics of topological insulators at optical frequencies
title_full Plasmonics of topological insulators at optical frequencies
title_fullStr Plasmonics of topological insulators at optical frequencies
title_full_unstemmed Plasmonics of topological insulators at optical frequencies
title_sort plasmonics of topological insulators at optical frequencies
publishDate 2018
url https://hdl.handle.net/10356/88516
http://hdl.handle.net/10220/45817
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