期刊
ACS PHOTONICS
卷 7, 期 8, 页码 2080-2088出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.0c00514
关键词
parity-time symmetry; laser oscillators; coherent perfect absorbers; electromagnetic sensors; RF and microwave sensing; optical sensing
类别
资金
- NSF [ECCS-1917678]
Achieving extraordinarily high sensitivity is a long-sought goal in the development of novel and more capable electromagnetic sensors. We present here how a coherent perfect absorber-laser (CPAL) enabled by parity-time (PT) symmetry breaking may be exploited to build ultrasensitive monochromatic electromagnetic sensors that use radio waves, microwaves, terahertz radiations, or light. We argue the possibility of using such CPAL sensors to detect extremely small-scale perturbations of admittance or refractive index caused by, for example, low-density gas molecules and microscopic properties, as they may drastically vary the system's output intensity from very low (coherent absorption) to high (lasing). We derive the physical bounds on CPAL sensors, showing that their sensitivity and resolvability may go well beyond traditional electromagnetic sensors, such as sensors based on Fabry-Perot cavities.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据