A plasmonic waveguide end-coupled to two plasmonic cavities in a non-Hermitian quantum system for dual-band unidirectional reflectionlessness

Autor:	Chengshou An, Xing Ri Jin, Fei Zhao, Hang Yang, Ying-Qiao Zhang, De-Xiu Qiu, Lingxue Yu
Rok vydání:	2021
Předmět:	Physics Physics and Astronomy (miscellaneous) Plasmonic waveguide Exceptional point business.industry Quantum system Physics::Optics Optoelectronics Multi-band device business Hermitian matrix Plasmon
Zdroj:	Communications in Theoretical Physics. 73:035102
ISSN:	1572-9494 0253-6102
DOI:	10.1088/1572-9494/abda18
Popis:	We demonstrate the possibility of dual-band unidirectional reflectionlessness in a non-Hermitian quantum system composed of a plasmonic waveguide and two end-coupled plasmonic cavities (PCs). Our scheme exhibits dual-band unidirectional reflectionlessness can be obtained at exceptional points by properly adjusting the coupling strength between two PCs, the ratio of decay rates of two PCs, and the ratio of plasmonic cavity-waveguide coupling strengths. As a valuable feature, the quality factor reaches to ∼175.4 in forward direction, while the backward quality factor is close to ∼188.2.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fb7469a3d75165dcaf8b00e8aaf4e15b https://doi.org/10.1088/1572-9494/abda18 Zobrazit plný text záznamu