Dual-band unidirectional reflectionlessness at exceptional points in a plasmonic waveguide system based on near-field coupling between two resonators.
Nanotechnology
; 30(4): 045205, 2019 Jan 25.
Article
em En
| MEDLINE
| ID: mdl-30499459
ABSTRACT
Dual-band unidirectional reflectionlessness at exceptional points is investigated theoretically in a non-Hermitian plasmonic waveguide system, based on near-field coupling by using only two resonators. The system consists of a metal-insulator-metal waveguide end-coupled to two nanohole resonators. The reflectivity for the forward (backward) direction is â¼0 (â¼0) at frequency 205.20 THz (194.56 THz), while for the backward (forward) direction it is â¼0.76 (â¼0.78). Moreover, the quality factors of the dual-band unidirectional reflectionlessness for forward and backward directions can reach â¼132 and â¼137, respectively.
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MEDLINE
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Ano de publicação:
2019
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Article