Fig. 1. RIS-assisted mixed RF/FSO secure communication system model

Fig. 2. RIS-assisted FSO link system model

Fig. 3. 2D schematic diagram of equivalent mirror-assisted system

Fig. 4. SOP for different turbulence intensity and detection mode

Fig. 5. SOP for different correlation coefficients and eavesdropper average SNR

Fig. 6. RIS position change model

Fig. 7. SOP for different RIS positions and standard deviation of jitter angles

Fig. 8. SPSC probability for different turbulence intensity and detection mode

Fig. 9. SPSC probability for different turbulence intensity and standard deviation of jitter angle

Fig. 10. SPSC probability for different correlation coefficients and eavesdropper average SNR