Authors:
M. Olivier
1
;
R. Boidin
1
;
P. Hawlová
1
;
P. Němec
1
and
V. Nazabal
2
Affiliations:
1
University of Pardubice, Czech Republic
;
2
Université de Rennes 1 and University of Pardubice, France
Keyword(s):
Amorphous Chalcogenides, Thin Films, Kinetics, Photosensitivity, Photodarkening, Photobleaching.
Related
Ontology
Subjects/Areas/Topics:
Mobile Software and Services
;
Optical Materials
;
Optics
;
Photonics, Optics and Laser Technology
;
Photorefractive Effects, Materials, and Devices
;
Telecommunications
;
Wireless Information Networks and Systems
Abstract:
Chalcogenide (GeSe2)100-x(Sb2Se3)x thin films obtained using pulsed laser deposition are exposed to light
with energy close to band gap energy, in order to investigate kinetics of photoinduced phenomena. It
appears that a reversible transient photodarkening is observed. The metastable part of photodarkening,
which seems to be slower, is followed by photobleaching. A modelling of the evolution of transmission
during illumination suggests that each process has an independent effective time constant, and that
magnitude of photoinduced phenomena depends on various parameters, such as laser’s fluency, absorption
coefficient and composition.