Spectral dependence of photoinduced surface relief grating formation in amorphous chalcogenides

Abstract

The surface relief grating (SRG) formation in As40S60 and As40S15Se45 thin films by holographic recording with the laser wavelenghts in the spectral region of 375 – 671 nm was studied. A strong dependence of SRG formation efficiency on recording light penetration depth in the films was observed. The best SRG recording efficiency in As40S60 films was observed at 491 nm, but for As40S15Se45 films by recording with a red light.