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Electrical and optical characterisation of electrochromic damages in KTP single crystals

Satyanarayan, MN and Bhat, HL (1998) Electrical and optical characterisation of electrochromic damages in KTP single crystals. In: 9th International Meeting on Ferroelectricity. IMF-9, 24-29 Aug. 1997, Seoul, South Korea, pp. 420-423.

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Abstract

The electrically produced grey-tracks in KTP single crystals have been studied employing electrical and optical techniques. A study of dielectric properties of the grey tracked crystals shows a decrease: in the low-frequency dielectric constant $ε_{33}$ and dielectric loss. The loss peak showed a shift towards the low-frequency. A decrease in the a.c. ionic conductivity is also observed in the grey tracked samples. The photoluminescence (PL) spectra of the electrically damaged KTP show a broadband luminescence in the 700-900 nm region with a peak at 885 nm. The temperature and intensity dependences of the PL peaks were carried out. The observed photoluminescence is attributed to $^2E$ to $^2T_2$ transitions in the $Ti^{3+}$ levels

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Korean Phys. Soc
Keywords: dielectric losses;electrochromism;ionic conductivity; permittivity;photoluminescence;potassium compounds; spectral line intensity
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 16 Jul 2007
Last Modified: 27 Aug 2008 12:41
URI: http://eprints.iisc.ernet.in/id/eprint/10109

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