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PHOTOINDUCED FLUIDITY ENHANCED BY ELECTRIC FIELD IN AMORPHOUS CHALCOGENIDES

K. Shimakawa1,*

Affiliation

  1. Department of Electrical and Electronic Engineering, Gifu University, Gifu 501-1193, Japan

Abstract

Current topics of photodarkening and photoinduced volume change are briefly reviewed. To get more insight into these phenomena which can be regarded as structural fluidity, the effects of d.c. electric fields on photodarkening in amorphous As2Se3 films are examined. It is observed that application of an electric field accelerates photodarkening, depending on the magnitude and polarity of the field. The results suggest that charge separation between photoexcited electrons and holes is an important factor for photoinduced fluidity to occur, supporting an electronic charging model of photodarkening and photoinduced volume change, as recently formulated..

Keywords

Chalcogenide glasses, Photoinduced structural fluidity, Photodarkening, Electric field effects.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

K. Shimakawa, PHOTOINDUCED FLUIDITY ENHANCED BY ELECTRIC FIELD IN AMORPHOUS CHALCOGENIDES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 145-151 (2005)