Interaction of Polarized Light with Chalcogenide Glasses
BEN-GURION UNIV OF THE NEGEV BEERSHEBA (ISRAEL)
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In the first part of the paper we summarize the results of our study of photoinduced optical anisotropy in thin film and bulk samples of different chalcogenide glasses. We distinguish three ranges of exciting photons energy above-band-gap excitation, sub-band-gap excitation and super-band-gap excitation. We claim that in each of these excitation ranges, different mechanisms are responsible for appearance of photoinduced anisotropy, namely, creation and next orientation of photoinduced defects, creation of anisotropically scattering defects and orientation of main covalent bonds of the glass in addition to creation and orientation of defects are the main reasons of observed anisotropy in the mentioned spectral ranges. We consider also some interesting results obtained recently in different research groups-. Among them polarization dependent photocrystallization of some amorphous films, polarization-dependent photodoping of chalcogenide films by metals, photoinduced anisotropy of photoconductivity, polarization-dependent optomechanical effect and photoinduced an isotropy in the ion-conducting amorphous chalcogenide films.
- Electrooptical and Optoelectronic Devices