Open AccessUnidirectional reflectionless phenomenon in periodic ternary layered material
Author(s) -
Erchan Yang,
Yonghua Lü,
Yong Wang,
Yanmeng Dai,
Pei Wang
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.014311
Subject(s) - reflection (computer programming) , phenomenon , optics , physics , ternary operation , dielectric , coupling (piping) , total internal reflection , unit (ring theory) , materials science , optoelectronics , quantum mechanics , computer science , mathematics , programming language , mathematics education , metallurgy
Unidirectional reflectionless phenomenon is reported in periodic ternary layered material (PTLM). The unit of the material is composed of two real dielectric layers and a complex medium (loss or gain) layer. The model is analyzed by coupled mode theory. Because of the asymmetric coupling between the forward and backward propagating modes, the left- and right-side reflectivities of this PTLM are generally unequal. The necessary and sufficient (NS) condition for unidirectional reflectionless phenomenon is presented in a concise formulation. And the underlying physical mechanism of the unidirectional reflectionless phenomenon in this material is revealed by numerical simulations. Both unidirectional reflectionless and symmetric reflection phenomena can be realized by judicious choice of the structural and optical parameters.