Abstract

A novel photoaddressed spatial light modulator with a highly photosensitive hydrogenated amorphous-silicon carbide photoreceptor and a ferroelectric liquid-crystal layer has been developed that operates in a transmission mode for visible light. The hydrogenated amorphous-silicon carbide photoreceptor shows a high photosensitivity comparable with that of hydrogenated amorphous silicon, which is prepared by a plasma chemical vapor deposition method with helium dilution of the source gases SiH₄ and C₂H₂. An image is input to the photoaddressed spatial light modulator by blue or green light, and an output is read out by red light as a transmitted image. The photoaddressed spatial light modulator exhibits a response time of ~50 μs and a contrast ratio of 30:1 under a write light (λ = 565 nm) of 1.5 mW/cm² intensity and a resolution of 90 line pairs/mm.

© 1993 Optical Society of America

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