Photoinduced macroscopic vector deformations in chalcogenide glasses

Photoinduced vector deformations in amorphous Se films on viscous and rigid substrates have been studied for comparison with those in As2S3. In both the films, illumination of focused and unfocused linearly-polarized bandgap light produces, respectively, anisotropic M-shape deformations and wavy wrinkles. The M-deformations occur in parallel to the electric field, but the wavy directions are contrastive; parallel and orthogonal to the electric field in Se and As2S3 films on grease. The unfocused illumination also produces corrugations in As2S3 films on glass substrates. We assume that atomic and optical forces are responsible for these deformations.