Photoinduced volume changes in obliquely deposited a‐Se

Abstract

The structures and the photoinduced volume changes of obliquely deposited amorphous selenium were studied using Molecular Dynamics computer simulation. Obliquely deposited a‐Se thin films contain larger voids than the flatly deposited ones. Our computer simulations confirmed that the preparation method strongly determines the photoinduced changes of the chalcogenide glasses. We described in detail for the first time the complex atomic rearrangements occurring on photo‐excitation in porous samples, which are reversible and irreversible photo contraction/expansion, bond breakings and formations (both inter‐ and intrachain). A model for the kinetics of the photoinduced volume changes of flatly and obliquely deposited chalcogenide thin films is presented. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Photoinduced Volume Changes of Obliquely and Flatly Deposited Amorphous AsSe Films Universal Description of the Kinetics

“…In the bonding configuration appeared covalent and interchain bond formations and bond breakings, chain deformations and slips, photoinduced covalent bond shift, and ring formations. 24) Table I. The density of amorphous Se samples (g/cm 3 ), grown in angles of incidence 0, 20, 45, and 60 .…”

“…Analyzing the samples on microscopic level various changes were detected. In the bonding configuration appeared covalent and interchain bond formations and bond breakings, chain deformations and slips, photoinduced covalent bond shift, and ring formations 24).…”