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Optical Engineering

Effects Of Photoexcitation Of Self-Trapped Excitons In Insulators
Author(s): Noriaki ltoh; Katsumi Tanimura
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Paper Abstract

Experimental observations of the consequences of generation of excited states of self-trapped excitons in insulators such as alkali halides and alkaline earth fluorides are surveyed. Three types of excited states are distinguished: electron-excited and hole-excited states of self-trapped exciton and host-excited states bound by a self-trapped exciton. The most extensive studies have been carried out for electron-excited states, which are deexcited dominantly by nonradiative transitions. A few examples are given of the photoinduced transformation of an excited self-trapped exciton in these states to a Frenkel pair in alkali halides and alkaline earth fluorides. It is emphasized that under laser irradiation with subgap photon energies, the self-trapped excitons and the Frenkel pairs generated by multiphoton excitation act as a source of one-photon absorption.

Paper Details

Date Published: 1 October 1989
PDF: 5 pages
Opt. Eng. 28(10) 281034 doi: 10.1117/12.7977088
Published in: Optical Engineering Volume 28, Issue 10
Show Author Affiliations
Noriaki ltoh, Nagoya University (Japan)
Katsumi Tanimura, Nagoya University (Japan)


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