Non-Hermitian heterostructure for two-parameter sensing
Optics
2019-03-21 v2 Materials Science
Applied Physics
Quantum Physics
Abstract
Non-Hermitian systems at the exceptional point (EP) degeneracy are demonstrated to be highly sensitive to environmental perturbation. Here, we propose and theoretically investigate a novel multilayered heterostructure favoring double EPs for a unique set of material parameters at which forward- and backward-reflection coefficients vanish, respectively. Such an EP heterostructure is shown to scatter off light when system parameters are perturbed away from the degeneracies due to the effect of ambient temperature and mechanical stress fluctuations. The proposed structure is conducive in manipulating optical responses for two mutually independent parameters sensing.
Cite
@article{arxiv.1902.09479,
title = {Non-Hermitian heterostructure for two-parameter sensing},
author = {Jieun Yim and Han Zhao and Bikashkali Midya and Liang Feng},
journal= {arXiv preprint arXiv:1902.09479},
year = {2019}
}