Optical Sensitizing of Photorefractive Sn2P2S6 With CW and Pulsed Pre-Exposure (Preprint)

Abstract : Pre-exposure of Sn2P2S6 to visible light gives rise to a temporary increase of the effective trap density and thereforeimproves the photorefractive response. With cw pre-exposure and nanosecond pulse pre-exposure we study temporal dynamics of the Sn2P2S6 sample transmission to reveal a sequence of processes that result in a desirable sensitization.