Fig. 1. Schematic of high-temperature superconducting thin films with artificial nanoporous structure. (a) Simulation model; (b) artificial nanoporous structure and parameters

Fig. 2. Accuracy verification of optical parameter and calculation method. (a) Tl-2212 film; (b) YBCO film

Fig. 3. Light response properties of Tl-2212 films with different thicknesses. (a) Transmission; (b) reflection; (c) absorption

Fig. 4. Light response properties of YBCO films with different thicknesses. (a) Transmission; (b) reflection; (c) absorption

Fig. 5. Comparison of absorption between 20 nm thick porous films and uniform films. (a) Tl-2212 films in the near-infrared spectral region; (b) YBCO films in the mid-infrared spectral region

Fig. 6. Comparison of light absorption of 30 nm films under different equivalent models. (a) Tl-2212 film; (b) YBCO film

Fig. 7. MSE of light absorption for various equivalent models with different thicknesses of films. (a) Tl-2212 film; (b) YBCO film

Fig. 8. Structure of the optical cavity device to be optimized

Fig. 9. Verification of optimization results for Tl-2212 films of different thicknesses. (a) 10 nm; (b) 20 nm; (c) 30 nm

Fig. 10. Verification of optimization results for YBCO films of different thicknesses. (a) 10 nm; (b) 20 nm; (c) 30 nm

Fig. 11. Impact of film thickness on the optimization results of light absorption rate. (a) Tl-2212 film; (b) YBCO film