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Photo-induced deformations in chalcogenide glass: Atomic or optical force?

K. TANAKA1,* , M. MIKAMI1

Affiliation

  1. Department of Applied Physics, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, JAPAN

Abstract

After an overview of photo-deformations in chalcogenide glasses, we study vector deformations appearing in semi-free As2S3 flakes and films with a few micron thicknesses. Upon illumination of linearly polarized bandgap light with a spot diameter of ~0.5 mm, powders (~10 μm in lateral size) of As2S3 laid on viscous grease rotate so that the film plane becomes orthogonal to the polarization direction. The flake (~0.1 mm) undergoes U-shape folding and spiral elongation, while the film (» 0.5 mm in lateral size) exhibits a large sinusoidal corrugation. We propose that these rotation and deformations in the powder, flake, and film are triggered not by microscopic atomic forces but by macroscopic optical forces..

Keywords

Photoinduced, Deformation, Chalcogenide glass, Viscosity, Radiation force.

Submitted at: July 5, 2009
Accepted at: Dec. 10, 2009

Citation

K. TANAKA, M. MIKAMI, Photo-induced deformations in chalcogenide glass: Atomic or optical force?, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 12, pp. 1885-1890 (2009)