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Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures

Control over charge carrier density provides an efficient way to trigger phase transitions and modulate the optoelectronic properties of materials. This approach can also be used to induce topological transitions in the optical response of photonic systems. Here we report a topological transition in...

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Autores principales: Hu, Hai, Chen, Na, Teng, Hanchao, Yu, Renwen, Qu, Yunpeng, Sun, Jianzhe, Xue, Mengfei, Hu, Debo, Wu, Bin, Li, Chi, Chen, Jianing, Liu, Mengkun, Sun, Zhipei, Liu, Yunqi, Li, Peining, Fan, Shanhui, García de Abajo, F. Javier, Dai, Qing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9477736/
https://www.ncbi.nlm.nih.gov/pubmed/35982316
http://dx.doi.org/10.1038/s41565-022-01185-2
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author Hu, Hai
Chen, Na
Teng, Hanchao
Yu, Renwen
Qu, Yunpeng
Sun, Jianzhe
Xue, Mengfei
Hu, Debo
Wu, Bin
Li, Chi
Chen, Jianing
Liu, Mengkun
Sun, Zhipei
Liu, Yunqi
Li, Peining
Fan, Shanhui
García de Abajo, F. Javier
Dai, Qing
author_facet Hu, Hai
Chen, Na
Teng, Hanchao
Yu, Renwen
Qu, Yunpeng
Sun, Jianzhe
Xue, Mengfei
Hu, Debo
Wu, Bin
Li, Chi
Chen, Jianing
Liu, Mengkun
Sun, Zhipei
Liu, Yunqi
Li, Peining
Fan, Shanhui
García de Abajo, F. Javier
Dai, Qing
author_sort Hu, Hai
collection PubMed
description Control over charge carrier density provides an efficient way to trigger phase transitions and modulate the optoelectronic properties of materials. This approach can also be used to induce topological transitions in the optical response of photonic systems. Here we report a topological transition in the isofrequency dispersion contours of hybrid polaritons supported by a two-dimensional heterostructure consisting of graphene and α-phase molybdenum trioxide. By chemically changing the doping level of graphene, we observed that the topology of polariton isofrequency surfaces transforms from open to closed shapes as a result of doping-dependent polariton hybridization. Moreover, when the substrate was changed, the dispersion contour became dominated by flat profiles at the topological transition, thus supporting tunable diffractionless polariton propagation and providing local control over the optical contour topology. We achieved subwavelength focusing of polaritons down to 4.8% of the free-space light wavelength by using a 1.5-μm-wide silica substrate as an in-plane lens. Our findings could lead to on-chip applications in nanoimaging, optical sensing and manipulation of energy transfer at the nanoscale.
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spelling pubmed-94777362022-09-17 Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures Hu, Hai Chen, Na Teng, Hanchao Yu, Renwen Qu, Yunpeng Sun, Jianzhe Xue, Mengfei Hu, Debo Wu, Bin Li, Chi Chen, Jianing Liu, Mengkun Sun, Zhipei Liu, Yunqi Li, Peining Fan, Shanhui García de Abajo, F. Javier Dai, Qing Nat Nanotechnol Article Control over charge carrier density provides an efficient way to trigger phase transitions and modulate the optoelectronic properties of materials. This approach can also be used to induce topological transitions in the optical response of photonic systems. Here we report a topological transition in the isofrequency dispersion contours of hybrid polaritons supported by a two-dimensional heterostructure consisting of graphene and α-phase molybdenum trioxide. By chemically changing the doping level of graphene, we observed that the topology of polariton isofrequency surfaces transforms from open to closed shapes as a result of doping-dependent polariton hybridization. Moreover, when the substrate was changed, the dispersion contour became dominated by flat profiles at the topological transition, thus supporting tunable diffractionless polariton propagation and providing local control over the optical contour topology. We achieved subwavelength focusing of polaritons down to 4.8% of the free-space light wavelength by using a 1.5-μm-wide silica substrate as an in-plane lens. Our findings could lead to on-chip applications in nanoimaging, optical sensing and manipulation of energy transfer at the nanoscale. Nature Publishing Group UK 2022-08-18 2022 /pmc/articles/PMC9477736/ /pubmed/35982316 http://dx.doi.org/10.1038/s41565-022-01185-2 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/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/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Hu, Hai
Chen, Na
Teng, Hanchao
Yu, Renwen
Qu, Yunpeng
Sun, Jianzhe
Xue, Mengfei
Hu, Debo
Wu, Bin
Li, Chi
Chen, Jianing
Liu, Mengkun
Sun, Zhipei
Liu, Yunqi
Li, Peining
Fan, Shanhui
García de Abajo, F. Javier
Dai, Qing
Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures
title Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures
title_full Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures
title_fullStr Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures
title_full_unstemmed Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures
title_short Doping-driven topological polaritons in graphene/α-MoO(3) heterostructures
title_sort doping-driven topological polaritons in graphene/α-moo(3) heterostructures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9477736/
https://www.ncbi.nlm.nih.gov/pubmed/35982316
http://dx.doi.org/10.1038/s41565-022-01185-2
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