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https://elib.bsu.by/handle/123456789/288782
Заглавие документа: | CPA-Lasing Associated with the Quasibound States in the Continuum in Asymmetric Non-Hermitian Structures |
Авторы: | Novitsky, D.V. Valero, A.K. Krotov, A. Salgals, T. Shalin, A.S. Novitsky, Andrey V. |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Астрономия |
Дата публикации: | 2022 |
Издатель: | American Chemical Society |
Библиографическое описание источника: | ACS Photonics 2022;9(9):3035-3042 |
Аннотация: | Non-Hermitian photonic systems with loss and gain attract much attention due to their exceptional abilities in molding the flow of light. Introducing asymmetry to the PT-symmetric system with perfectly balanced loss and gain, we reveal the mechanism of transition from the quasibound state in the continuum (quasi-BIC) to the simultaneous coherent perfect absorption (CPA) and lasing in a layered structure comprising epsilon-near-zero media. Two types of asymmetry (geometric and non-Hermitian) are analyzed with the scattering matrix technique. The effect of the CPA-lasing associated with the quasi-BIC is characterized with the unusual linear dependence of the quality factor on the inverse of the asymmetry parameter. Moreover, the counter-intuitive loss-induced-lasing-like behavior is found at the CPA-lasing point under the non-Hermitian asymmetry. The reported features of non-Hermitian structures are perspective for sensing and lasing applications |
URI документа: | https://elib.bsu.by/handle/123456789/288782 |
DOI документа: | 10.1021/acsphotonics.2c00790 |
Scopus идентификатор документа: | 85138122024 |
Финансовая поддержка: | The work was supported by the Belarusian Republican Foundation for Fundamental Research (Project No. F20R-158) and the Russian Foundation for Basic Research (Project No. 20-52-00031). The loss-induced lasing-like behavior investigation has been partially supported by the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 075-15-2022-1150). The poles and zeros calculations have been partially supported by the Russian Science Foundation (Grant No. 21-12-00383). A.S.S. acknowledges the support of the Latvian Council of Science (Project DNSSN, No. lzp-2021/1-0048) |
Лицензия: | info:eu-repo/semantics/openAccess |
Располагается в коллекциях: | Кафедра физической оптики и прикладной информатики (статьи) Кафедра теоретической физики и астрофизики (статьи) |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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2205.11336.pdf | 597,68 kB | Adobe PDF | Открыть |
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