Spatial light modulating element using uniaxial single crystal of oxide as insulating layer.

摘要

A spatial light modulating element (12) including an electrooptic and photoconductive single crystal plate (2), a light-transmitting insulating layer (4) provided on at least one of opposite surfaces of the electrooptic and photoconductive single crystal plate, and a pair of electrodes (6, 6, 16) provided for applying an electric field to the insulating layer and the single crystal plate. The insulating layer (4) is formed from a uniaxial single oxide crystal which is crystallographically oriented such that the insulating layer exhibits neither birefringence, nor an electrooptic effect in a direction of the electric field. The insulating layer may be a LiNbO3, LiTaO3 or TiO2 (rutile) single crystal plate normal to the (001)-axis.