Sensing Gases by the Pole Effect of Parity-Time Symmetric Coupled Resonators

被引：23
|
作者：
Fang, Yuntuan [1 ]
Li, Xiaoxue [1 ]
Xia, Jing [1 ]
Xu, Zhibing [2 ]
机构：
[1] Jiangsu Univ, Sch Comp Sci & Telecommun Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Anqing Normal Univ, Coll Resources & Environm, Anqing 246011, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2019年 / 19卷 / 07期
基金：
美国国家科学基金会;
关键词：
Sensor; PT symmetry; pole effect; coupled resonator; SENSITIVITY; SENSOR;
D O I：
10.1109/JSEN.2018.2887084
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The pole is the unique phenomena in the parity-time (PT) symmetry structure. To explore the application of the pole effect, a PT-symmetry resonator coupling system is designed as a gas sensor. The large transmittance and reflectance near the pole are found extraordinary sensitive to the refractive index of the polluted air in the system. Through measuring the reflectance, the refractive index of the polluted air and the concentration of gas in the air can be detected. The sensor has an extraordinary sensitivity in detecting the gases with low concentration. The maximum sensitivities Delta R/R for the methane, acetylene, and ethane are 0.112, 0.190, and 0.282, respectively. The limitation of detectable concentration change is 1/1500 for methane with the photodetector that can sense the relative change rate of the reflectance of 10(-3).
引用
收藏
页码：2533 / 2539
页数：7
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