"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Dynamics of photodarkening in amorphous arsenic chalcogenide

Y. SAKAGUCHI1,* , K. TAMURA1

Affiliation

  1. Graduate School of Engineering, Kyoto University, Kyoto 606-8501 Japan

Abstract

We have performed transient optical absorption measurements for amorphous As2Se3 and As2S3 using a nanosecond pulsed laser and specially designed optical cells, which prepared melt-quenched amorphous film of micrometer and sub-micrometer size. From the measurements, we have observed (I) transient photodarkening in the nano- and microsecond domain, which is a photo-response for one pulse of the laser, (II) accumulative photoinduced absorption for repeated pulsed illumination, (III) a decay of the accumulated photoinduced absorption after stopping the illumination and (IV) a saturation of the decay. Temperature dependence of these photoinduced effects was examined from room temperature to 430 oC for As2Se3, 300 oC for As2S3 including liquid state. Dynamics of the photodarkening is discussed on the basis of the experimental results..

Keywords

Amorphous chalcogenide, Liquid chalcogenide, Photodarkening.

Submitted at: Oct. 26, 2006
Accepted at: Nov. 2, 2006

Citation

Y. SAKAGUCHI, K. TAMURA, Dynamics of photodarkening in amorphous arsenic chalcogenide, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 6, pp. 2101-2107 (2006)