Open AccessOptical non-reciprocity induced by asymmetrical dispersion of Tamm plasmon polaritons in terahertz magnetoplasmonic crystals
Author(s) -
Quan Shi,
Hui Dong,
Kin Hung Fung,
Dong Zhang,
Jin Wang
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.26.033613
Subject(s) - terahertz radiation , surface plasmon polariton , surface plasmon , optics , reciprocity (cultural anthropology) , polariton , dispersion relation , quantum tunnelling , condensed matter physics , plasmon , materials science , surface wave , metamaterial , photonic crystal , dispersion (optics) , physics , psychology , social psychology
Nonreciprocal light phenomena, including one-way wave propagation along an interface and one-way optical tunneling, are presented at terahertz frequencies in a system of magnetically controlled multi-layered structure. By varying the surface termination and the surrounding medium, it is found that the nonreciprocal bound or radiative Tamm plasmon polartions can be supported, manipulated, and well excited. Two different types of contributions to the non-reciprocity are analyzed, including the direct effect of magnetization-dependent surface terminating layer as well as violation of the periodicity in truncated multi-layered systems. Calculations on the asymmetrical dispersion relation of surface modes, field distribution, and transmission spectra through the structure are employed to confirm the theoretical results, which may potentially impact the design of tunable and compact optical isolators.