Open AccessDesigning plasmonic exceptional points by transformation optics
Author(s) -
Xiaoqing Zhu,
Hongfei Wang,
Dangyuan Lei,
J. B. Pendry,
Jensen Li
Publication year - 2021
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.415323
Subject(s) - hermitian matrix , parity (physics) , optics , plasmon , physics , transformation optics , transformation (genetics) , series (stratigraphy) , symmetry (geometry) , theoretical physics , metamaterial , quantum mechanics , mathematics , geometry , paleontology , biology , biochemistry , chemistry , gene
Exceptional points (EPs) have been shown to be useful in bringing about sensitive optical properties based on non-Hermitian physics. For example, they have been applied in plasmonics to realize nano-sensing with extreme sensitivity. While the exceptional points are conventionally constructed by considering parity-time symmetric or anti-parity-time symmetric media, we theoretically demonstrate the possibility of generating a series of non-Hermitian systems by transforming a seed system with conventional parity-time symmetry within the transformation optics framework. The transformed systems do not possess PT-symmetry with a conventional parity operator after a spatial operation, i.e. hidden from conventional sense, but are equipped with exceptional points and phase transitions, hinting an alternative method to design non-Hermitian plasmonic systems with sensitive spectra or eigenmodes.