Formation of electrostatic field gratings in glass by optical and acoustical waves

摘要

Photogalvanic effect induced by joint action of optical wave and `external' coherent waves of arbitrary origin arising in the second-order approximation in powers of both optical electric field and `external' field and microscopic models of the effect caused by point defects in silica glass are considered. Spatially-periodical gratings of electrostatic field with arbitrary spatial period may be formed in the glass owing to the forth-order photogalvanic effect caused by optical and acoustical waves acting together.