波长
光学
谐振器
物理
灵敏度(控制系统)
摄动(天文学)
参数空间
数学
电子工程
量子力学
工程类
统计
作者
Yulin Wu,Peiji Zhou,Ting Li,Weishi Wan,Yi Zou
出处
期刊:Optics Express
[The Optical Society]
日期:2021-02-10
卷期号:29 (4): 6080-6080
被引量:28
摘要
Exceptional points (EPs) could potentially enhance the sensitivity of an optical sensing system by orders of magnitude. Higher-order EP systems, having more complex physics, can further boost this parameter. In this paper, we investigate the response order of high-order non-Hermitian systems and provide a guideline for designing a sensor with high response order. Based on this design rule, we propose and demonstrate an optical sensor with a fourth-order response, and analyze its associated properties. The four resonant wavelengths of our optical sensor simultaneously collapse at a high-order exceptional point in the parameter space, providing a fourth root relation between the amount of wavelength splitting and the amplitude of the perturbation. A large sensitivity enhancement factor over 100, is observed when the wavelength splitting is compared with traditional single resonator-based sensors under small perturbation conditions.
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