Bismuth Silicon Oxide (BSO) Bi12SiO20
Bismuth Germanium Oxide (BGO) Bi12GeO20B
Sillenite type monocrystals Bi12SiO20 (BSO) and Bi12GeO20 (BGO) display unique combination of different physical properties. Crystals BSO and BGO are very efficient photoconductors with low dark conductivity. Strong spectral dependence of the photoconductivity allows to produce a wide range of optical device and systems. Combination of electro-optical and photoconductive properties display photorefractive effect (PR) in the crystals. BSO crystals are used like photoconductor in optically-addressed spatial light modulators (OASLM) and liquid crystal light valves (LCLV) with electro-optical modulation into liquid crystal medium. Both crystals BSO, BGO are used like electro-optic and photoconductive mediums for construction of PROM, PRIZ spatial modulators. Sillenite crystals are applied in dynamic real-time hologram recording devices, optical correlators, and optical laser systems for adaptive correction of ultra short light pulses. Photo-induced absorption in sillenite BTO films make possible to project a light-light type modulation. Production of sillenite thin-film crystal structures by different technologies permits the development of a long list of devices including optical waveguides, integrated optical devices. The use of waveguide optical structures based on sillenite crystals allows achieving uniform writing illumination in a wide spectral range. Crystals BSO, BGO are used in optical fiber electric/magnetic fields sensors.