"

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.

PHOTOINDUCED SCALAR AND VECTOR EFFECTS IN OBLIQUELY DEPOSITED a-As2S3 THIN FILMS

J. Dikova1,* , Tz. Babeva1, P. Sharlandjiev2

Affiliation

  1. Central Laboratory of Photoprocesses “Acad. J. Malinowsky”, Bulgarian Academy of Sciences, “Acad. G. Bonchev”str. bl. 109, 1113 Sofia, Bulgaria
  2. Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, “Acad. G. Bonchev” str. bl. 109, 1113 Sofia, Bulgaria

Abstract

The influence of the columnar microstructure on the photoinduced scalar and vector effects in obliquely deposited a-As2S3 films has been examined. For this purpose, the optical constants of non-illuminated and Ar+ laser illuminated As2S3 films, prepared at different vapour incidence angles, were determined from spectrophotometric measurements. Also, the kinetics of the photoinduced optical anisotropy in obliquely deposited samples was studied by means of a computerized polarimetric set-up. It is established that the scalar effect of photorefraction and the vector effect of the photoinduced birefringence are greatest in a As2S3 films prepared at the highest angle of incidence, which are characterized by the largest free volume in their structure. On the basis of the results obtained, the important role of the columnar microstructure in the occurrence of photoinduced transformations in arsenic chalcogenides has been discussed..

Keywords

Amorphous chalcogenides, As2S3, Thin films, Microstructure, Optical properties.

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

Citation

J. Dikova, Tz. Babeva, P. Sharlandjiev, PHOTOINDUCED SCALAR AND VECTOR EFFECTS IN OBLIQUELY DEPOSITED a-As2S3 THIN FILMS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 361-364 (2005)