Experimental observation of coherent-perfect-absorber and laser points in anti-PT symmetry

被引：1

作者：

Yang, Minye ^{[1
,2
]}

Zhong, Qi ^{[3
]}

Ye, Zhilu ^{[1
,2
]}

Ozdemir, Sahin K. ^{[3
,4
]}

Farhat, Mohamed ^{[5
]}

El-Ganainy, Ramy ^{[6
,7
]}

Chen, Pai-Yen ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, State Key Lab Mfg Syst Engn, Xian 710049, Shaanxi, Peoples R China

[2] Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA

[3] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA 16802 USA

[4] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[5] King Abdullah Univ Sci & Technol, Comp Elect & Math Sci & Engn Div, Thuwal 239556900, Saudi Arabia

[6] Michigan Technol Univ, Dept Phys, Houghton, MI 49931 USA

[7] Michigan Technol Univ, Henes Ctr Quantum Phenomena, Houghton, MI 49931 USA

来源：

PHYSICAL REVIEW A | 2024年 / 110卷 / 03期

关键词：

PARITY-TIME SYMMETRY; ABSORPTION;

D O I：

10.1103/PhysRevA.110.033504

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The coexistence of coherent perfect absorber and laser or amplifier (CPAL) point is a peculiar spectral singularity associated with the scattering matrices of non-Hermitian systems. While the potential of CPAL systems for sensing application has been highlighted recently, the extreme sensitivity of parity-time (PT)-symmetric CPAL devices to the input signal deviations has so far impeded their practical utilization. Here we explore a strategy for implementing CPAL circuits by exploiting another type of non-Hermitian symmetry, namely anti-PT (APT) symmetry. We demonstrate that the condition for building CPAL in our proposed APT-symmetric electronic circuits additionally requires parity symmetry, which simplifies the circuit design and implementation. Additionally, we show that this newly proposed structure is 1.85 times more robust compared to previous CPAL devices studied in the literature.

引用

页数：11