Exceptional points and enhanced nanoscale sensing with a plasmon-exciton hybrid system

被引：0

作者：

HONG JIANG ^{[1
]}

WEIDONG ZHANG ^{[1
]}

GUOWEI LU ^{[1
,2
,3
]}

LULU YE ^{[1
]}

HAI LIN ^{[1
]}

JINGLIN TANG ^{[1
]}

ZHAOHANG XUE ^{[1
]}

ZHENG LI ^{[1
,2
,3
]}

HAITAN XU ^{[4
,5
]}

QIHUANG GONG ^{[1
,2
,3
]}

机构：

[1] State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Center of Quantum Matter, Nano-optoelectronics Frontier Center of the Ministry of Education, School of Physics, Peking University

[2] School of Physical Sciences, University of Science and Technology of China

[3] Peking University Yangtze Delta Institute of Optoelectronics

[4] Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology

[5] Collaborative Innovation Center of Extreme Optics, Shanxi University

来源：

Photonics Research | 2022年 / 02期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

O53 [等离子体物理学]; TP212 [发送器（变换器）、传感器];

学科分类号：

070204 ; 080202 ;

摘要：

Singularities in the spectra of open systems, known as exceptional points(EPs), have been shown to exhibit nontrivial topological properties and enhanced sensitivities. Here, we propose a novel approach to realize the EPs in a plasmon-exciton hybrid system and explore their applications in enhanced nanoscale sensing technology.We consider a plasmon-exciton system composed of a gold nanorod and a monolayer WSe. By controlling the geometric parameters of the nano-hybrid system, we obtain simultaneous coalescence of the resonance frequencies and loss rates of the hybrid system, which is a unique feature of EPs. Numerical simulations show its application in enhanced nanoscale sensing for environmental refractive indices. Our work opens the way to a new class of sensors based on EP-enhanced sensing, with intrinsic nanoscale sensitivity due to the sub-diffractionlimit size of the plasmon-exciton nano-hybrid system.

引用

页码：557 / 563

页数：7

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