Research on sensing characteristics of diamond multilayer waveguide structure racetrack micro-ring resonator
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-01-01 |
| Journal | The European Physical Journal Applied Physics |
| Authors | Xin Li, Tian Gao, Wei Zhao, Dejie Sun, Xue Han |
| Institutions | Yanshan University, Institute of Electrical Engineering |
| Citations | 1 |
Abstract
Section titled āAbstractāA racetrack micro-ring resonant cavity sensor based on the diamondās material is proposed in this paper. In the model, the vertical-section of the waveguide adopts a five-layer ridge-type waveguide structure based on CH 3 NH 3 PbI 3 , SiO 2 and diamond, i.e. CH 3 NH 3 PbI 3 -SiO 2 -Diamond-SiO 2 -CH 3 NH 3 PbI 3 . First, on the basis of the resonant principle and coupled mode theory, this study investigated the light field intensity distribution characteristics of the integral resonant cavity, the longitudinal section of a single straight waveguide, the racetrack micro-ring, and the longitudinal section of the straight waveguide by using the finite element method in COMSOL. The analysis shows that the introduction of CH 3 NH 3 PbI 3 as an isolation layer can avoid the light scattering loss and leakage loss, and significantly enhance the filtering performance. In addition the sensing characteristics of the Add-drop racetrack resonator were further studied. Results showed that the structure could achieve a quality factor of 10 5 , and the sensitivity could reach 14833.33 dB/RIU. In the detection system with a signal-to-noise ratio of 30 dB, the detection limit was 2.02 Ć 10 ā7 RIU. Compared with the traditional All-pass single micro-ring resonator, the proposed structure shows advantages of high tenability, high sensitivity and low detection limit.