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Proceedings Paper

Temperature dependence of light-induced absorption in reduced Co:KNSBN crystal with multiple-shallow traps
Author(s): Yanqiu Li; Dangquoc Trung; Baoping Zhang; Yusaburo Segawa; Tadashi Itoh
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Paper Abstract

We studied the dependence of light-induced absorption on temperature in reduced Co:KNSBN crystal. The changes of light-induced absorption decrease as temperature decrease at high pump intensity, which can not be explained by previous two centers model. The dynamic behaviors of light-induced absorption reveal that there are multiple shallow levels in crystals. The thermal exciting rate and active energy of shallow levels are determined by the dependence of dynamics of light-induced absorption on pump intensity and temperature, respectively. The deep levels of reduced Co:KNSBN can be shown in transmission spectra of crystal. A model assuming both electron and hole with three shallow traps is used to explain our experimental results.

Paper Details

Date Published: 17 August 1998
PDF: 7 pages
Proc. SPIE 3554, Photorefractive Materials: Phenomena and Related Applications II, (17 August 1998); doi: 10.1117/12.318135
Show Author Affiliations
Yanqiu Li, RIKEN--The Institute of Physical and Chemical Research (Japan)
Dangquoc Trung, RIKEN--The Institute of Physical and Chemical Research (Japan)
Baoping Zhang, RIKEN--The Institute of Physical and Chemical Research (Japan)
Yusaburo Segawa, RIKEN--The Institute of Physical and Chemical Research (Japan)
Tadashi Itoh, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 3554:
Photorefractive Materials: Phenomena and Related Applications II
Peixian Ye; Tsutomu Shimura; Ratnakar R. Neurgaonkar, Editor(s)

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