Experiment on parity-time-symmetry phase transition in non-Hermitian metasurfaces

被引：5

作者：

Xu, Jingwei ^{[1
]}

Ouyang, Shoujian ^{[1
]}

Luo, Laibin ^{[1
]}

Shen, Yun ^{[1
,2
]}

Zou, Liner ^{[1
]}

Tan, Zhiyong ^{[3
]}

Deng, Xiaohua ^{[2
]}

机构：

[1] Nanchang Univ, Sch Phys & Mat Sci, Nanchang 330031, Jiangxi, Peoples R China

[2] Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Jiangxi, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2022年 / 39卷 / 07期

基金：

中国国家自然科学基金;

关键词：

EXCEPTIONAL POINT;

D O I：

10.1364/JOSAB.458036

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Metasurfaces consisting of two orthogonally oriented split-ring resonators with the same resonant frequency but different loss coefficients are proposed to devise a parity-time (PT)-symmetry system. Bovine serum albumin (BSA) solutions with different concentrations are dropped onto the metasurfaces to the realize PT-symmetry phase transitions. Theoretical and experimental results show that eigenstates of the PT system will change from circularly polarized states at the exceptional point to corotating ellipses along +/- 45 when the samples are from the bare metasurfaces to these with BSA, indicating phase transitions. Additionally, potential application of the system in a biosensor is illustrated as the transmission and ellipticity angle theta are sensitive to the concentrations of the BSA solution. (C) 2022 Optica Publishing Group

引用

页码：1847 / 1852

页数：6

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