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Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons

As one of leading technologies in detecting relativistic particles, Cherenkov radiation plays an essential role in modern high‐energy and particle physics. However, the limited photon yield in transparent dielectrics makes efficient Cherenkov radiation only possible with high‐energy particles (at le...

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Autores principales: Hu, Hao, Lin, Xiao, Liu, Dongjue, Chen, Hongsheng, Zhang, Baile, Luo, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9475543/
https://www.ncbi.nlm.nih.gov/pubmed/35863914
http://dx.doi.org/10.1002/advs.202200538
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author Hu, Hao
Lin, Xiao
Liu, Dongjue
Chen, Hongsheng
Zhang, Baile
Luo, Yu
author_facet Hu, Hao
Lin, Xiao
Liu, Dongjue
Chen, Hongsheng
Zhang, Baile
Luo, Yu
author_sort Hu, Hao
collection PubMed
description As one of leading technologies in detecting relativistic particles, Cherenkov radiation plays an essential role in modern high‐energy and particle physics. However, the limited photon yield in transparent dielectrics makes efficient Cherenkov radiation only possible with high‐energy particles (at least several MeV). This restriction hinders applications of Cherenkov radiation in free‐electron light source, bio‐imaging, medical therapy, etc. Broadband enhancement of Cherenkov radiation is highly desired for all these applications, but still widely acknowledged as a scientific challenge. To this end, a general approach is reported to enhance the photon yield of Cherenkov radiation using dispersionless plasmons. Broadband dispersionless plasmons can be realized by exploiting either the acoustic nature of terahertz plasmons in a graphene‐based heterostructure or the nonlocal property of optical plasmons in a metallodielectric structure. When coupled to moving electrons, such dispersionless plasmons give rise to a radiation enhancement rate more than two orders of magnitude (as compared with conventional Cherenkov radiation) over an ultrabroad frequency band. Moreover, since the phase velocity of dispersionless plasmons can be made as small as the Fermi velocity, giant radiation enhancements can be readily induced by ultralow‐energy free electrons (e.g., with a kinetic energy down to 3 eV), without resorting to relativistic particles.
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spelling pubmed-94755432022-09-28 Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons Hu, Hao Lin, Xiao Liu, Dongjue Chen, Hongsheng Zhang, Baile Luo, Yu Adv Sci (Weinh) Research Articles As one of leading technologies in detecting relativistic particles, Cherenkov radiation plays an essential role in modern high‐energy and particle physics. However, the limited photon yield in transparent dielectrics makes efficient Cherenkov radiation only possible with high‐energy particles (at least several MeV). This restriction hinders applications of Cherenkov radiation in free‐electron light source, bio‐imaging, medical therapy, etc. Broadband enhancement of Cherenkov radiation is highly desired for all these applications, but still widely acknowledged as a scientific challenge. To this end, a general approach is reported to enhance the photon yield of Cherenkov radiation using dispersionless plasmons. Broadband dispersionless plasmons can be realized by exploiting either the acoustic nature of terahertz plasmons in a graphene‐based heterostructure or the nonlocal property of optical plasmons in a metallodielectric structure. When coupled to moving electrons, such dispersionless plasmons give rise to a radiation enhancement rate more than two orders of magnitude (as compared with conventional Cherenkov radiation) over an ultrabroad frequency band. Moreover, since the phase velocity of dispersionless plasmons can be made as small as the Fermi velocity, giant radiation enhancements can be readily induced by ultralow‐energy free electrons (e.g., with a kinetic energy down to 3 eV), without resorting to relativistic particles. John Wiley and Sons Inc. 2022-07-21 /pmc/articles/PMC9475543/ /pubmed/35863914 http://dx.doi.org/10.1002/advs.202200538 Text en © 2022 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Hu, Hao
Lin, Xiao
Liu, Dongjue
Chen, Hongsheng
Zhang, Baile
Luo, Yu
Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons
title Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons
title_full Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons
title_fullStr Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons
title_full_unstemmed Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons
title_short Broadband Enhancement of Cherenkov Radiation Using Dispersionless Plasmons
title_sort broadband enhancement of cherenkov radiation using dispersionless plasmons
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9475543/
https://www.ncbi.nlm.nih.gov/pubmed/35863914
http://dx.doi.org/10.1002/advs.202200538
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