Effects of laser radiation on matter

Photoinduced absorption in chalcogenide glasses

V. V. Ponomar'


Abstract: A dependence of the absorption coefficient on the optical radiation intensity in the range 10 ^– 5 – 1 W/cm² was observed for chalcogenide glasses at a photon energy less than the band gap of the material. The absorption coefficient depended on the irradiation time. In the case of arsenic sulfide in the range 1.6–1.7 eV an absorption peak was observed at intensities of the order of 10 ^– 3 W/cm². In this part of the spectrum the absorption probably involved metastable As–As, S–S, and Se–Se "defect" bonds and was similar to the photoinduced degradation of hydrogenated amorphous silicon.

UDC: 621.373.826

PACS: 61.80.Ba, 78.20.Ci, 61.82.Fk

Received: 15.11.1989

 English version: Soviet Journal of Quantum Electronics, 1990, 20:8, 951–953

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