Highly sensitive gas sensor based on a parity-time-symmetric system

Achieving extremely high sensitivity is an important indicator in the development of novel and stable gas concentration sensors. In this paper, we present a gas concentration sensor with parity-time symmetry for high sensitivity at low concentrations. The proposed sensor can detect toxic gases, such as benzene, bromine, and acetone, by probing the faint changing of the permittivity. Furthermore, the level of the sensitivity can be adjusted by the resistance segment, which is realized by various metallic formations. Our proposed structure provides a novel idea for the development of future gas concentration sensors, showing an exciting prospect for gas sensing technologies. (c) 2022 Optical Society of America

Automated summary

In this paper, a gas concentration sensor with parity-time symmetry is proposed for high sensitivity at low concentrations. The sensor can detect toxic gases such as benzene, bromine, and acetone by probing the faint changing of the permittivity. The sensitivity level can be adjusted by the resistance segment, providing a novel idea for the development of future gas concentration sensors.