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On photoinduced volume changes in chalcogenide glasses

S. KUGLER1,* , J. HEGEDÜS2, R. LUKÁCS1

Affiliation

  1. Department of Theoretical Physics, Budapest University of Technology and Economics, H-1521Budapest, Budafoki út 8, Hungary
  2. Department of Physics and Material Sciences Center, Philipps University Marburg, Renthof 5, D-35032 Marburg, Germany

Abstract

We proposed a new explanation of photo-induced volume changes in chalcogenide glasses. In our computer simulation we observed covalent bond breaking in the network caused by excited electrons, whereas holes contribute to the formation of inter-chain bonds. The interplay between photo-induced bond breaking and inter-chain bond formation leads to either volume expansion or shrinkage. In the non-ideal case, only a part of the processes is reversible and the total expansion includes the reversible and irreversible changes. Finally we investigate the structural properties of flatly and obliquely deposited chalcogenide thin films. Different void sizes can cause different photoinduced volume changes..

Keywords

Chalcogenide glasses, Photoinduced volume changes, Computer simulation.

Submitted at: Nov. 1, 2006
Accepted at: Jan. 15, 2007

Citation

S. KUGLER, J. HEGEDÜS, R. LUKÁCS, On photoinduced volume changes in chalcogenide glasses, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 1, pp. 37-42 (2007)