Open AccessUnidirectional reflectionless phenomena in a non-Hermitian quantum system of quantum dots coupled to a plasmonic waveguide
Author(s) -
Nan Wu,
Cong Zhang,
Xing Ri Jin,
Ying Qiao Zhang,
YoungPak Lee
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.003839
Subject(s) - quantum dot , plasmon , physics , waveguide , quantum , quantum optics , hermitian matrix , optics , quantum wire , optoelectronics , quality (philosophy) , quantum mechanics
Unidirectional reflectionless phenomena are investigated theoretically in a non-Hermitian quantum system composed of several quantum dots and a plasmonic waveguide. By adjusting the phase shifts between quantum dots, single- and dual-band unidirectional reflectionlessnesses are realized at exceptional points based on two and three quantum dots coupled to a plasmonic waveguide, respectively. In addition, single- and dual-band unidirectional perfect absorptions with high quality factors are obtained at the vicinity of exceptional points.