Yuchen Zhao, Hao Tian, Jianhua Dou, Yanning Yuan, Xiaoli Xi. Optimal Design of Superconducting Nanowire Single-Photon Detector with High Light Absorptivity in Wavelength Range of 3-5 µm Based on Asymmetric Fabry-Pérot Cavity Structure[J]. Laser & Optoelectronics Progress, 2022, 59(17): 1704002
- Laser & Optoelectronics Progress
- Vol. 59, Issue 17, 1704002 (2022)
Fig. 1. Simulation model diagram of SNSPD. (a) Model 1 (M1); (b) model 2 (M2)
Fig. 2. Construction results for different DBRs. (a) High refractive index film material selection; (b) cycle number selection
Fig. 3. Intensity distributions of light field inside nanowires in M1 at 3-µm wavelength. (a) Si as a high refractive index film; (b) YSZ as a high refractive index film
Fig. 4. Comparison of TMM and FDTD simulation results
Fig. 5. Comparison of absorption rate curve results of proposed design and design in Ref. [25]
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Table 1. Theoretical calculation results of DBR reflection bandwidth
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Table 2. Optimization results of layer thickness to be optimized in two design models after defining DBR structure
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Table 3. Comparison of flatness results between proposed design and design in Ref. [25]
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