Fig. 1. Simulated structure of Ga₂O₃ using Geant4

Fig. 2. Simulation result of Ga₂O₃ absorption spectrum

Fig. 3. Relationship between absorptivity and detection distance

Fig. 4. Relationship of light intensity and absorptivity. (a) Absorptivity curves with different light intensities; (b) curve of absorptivity varying with light intensity

Fig. 5. Relationship of Ga₂O₃ thickness and absorptivity. (a) Absorptivity curves with different thicknesses; (b) curve of absorptivity varying with thickness

Fig. 6. Curve of absorptivity varying with crystal cross-sectional radius

Fig. 7. Performance Characterization of Ga₂O₃ Photodetectors. (a) I-t curve of Ga₂O₃ photodetector; (b) rise time and decay time within a single cycle; (c) I-V curve of Ga₂O₃ device under 254 nm illumination and in darkness； (d) curve of light-to-dark current ratio varying with voltage

Fig. 8. Relationship of response current and light intensity. (a) Curve of response current varying with time under different light intensities; (b) curve of response current varying with light intensity

Fig. 9. Curve of responsivity varying with incident light intensity

Fig. 10. Curve of responsivity varying with bias voltage

Fig. 11. Pulse response curve

Fig. 12. Curve of detectivity varying with light intensity

Fig. 13. Curve of detectivity varying with bias voltage