ENHANCED EFFECT OF TWO-BEAM COUPLING IN INFRARED PHOTOREFRACTIVE GaAs UNDER EXTERNAL ELECTRIC FIELD
外电场作用下红外光折变GaAs的双光束耦合增强效应

The enhanced infrared photorefractive effect in cubic crystal GaAs under externally applied electric field is described. The spatial amplitude and phase variations of space charge electric field in the two-beam coupling process are emphatically analyzed, which quite well explain the results of experimental measurement