Abstract
Non-Hermitian systems at 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 to manipulating optical responses for two mutually independent parameters sensing.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
O. V. Shramkova, K. G. Makris, D. N. Christodoulides, and G. P. Tsironis
Photon. Res. 6(4) A1-A5 (2018)
Xiangrong Wu, Zhiji Feng, Xiaofang Zhao, Feng Lin, and Zheyu Fang
Opt. Lett. 48(22) 6044-6047 (2023)
Haiwen Wang, Sid Assawaworrarit, and Shanhui Fan
Opt. Lett. 44(3) 638-641 (2019)