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Proceedings Paper

Effect of dopants on the photorefractive effect in 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3
Author(s): Tsutomu Shimura; Toshiyuki Fujisawa; Yasuhiro Satoh; Ryushi Fujimura; Katsuro Oda; Kazuo Kuroda
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Paper Abstract

Photorefractive properties of Fe, Mn, and Rh doped 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 (0.91PZN-0.09PT) are investigated. Relaxor ferroelectric crystals are expected to show large photorefractive effect due to its large piezoelectric effect near morphotropic phase boundary (MPB). Crystals are grown by flux solution method, then cut, polished, and poled along [110] direction. Absorption spectrum, photorefractive two-beam coupling gain, and response speed were measured as functions of the grating period, and light intensity, at several wavelengths for each doped and undoped samples. Photoconductivity and photochromism in Fe doped crystal were estimated. Fe doping enhanced the photorefractive effect and net two-beam coupling gain of 19 cm-1was obtained. Rh doping increased the gain at 633 nm compared to the undoped sample. From the intensity dependence of the two-beam coupling gain, two-center model is suitable for explaining the photorefractive properties of Fe doped samples. For all samples, doping of the ions slowed down the response speed because of the decrease of the photoconductivity.

Paper Details

Date Published: 20 January 2005
PDF: 7 pages
Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); doi: 10.1117/12.576477
Show Author Affiliations
Tsutomu Shimura, Univ. of Tokyo (Japan)
Toshiyuki Fujisawa, Univ. of Tokyo (Japan)
Yasuhiro Satoh, Univ. of Tokyo (Japan)
Ryushi Fujimura, Univ. of Tokyo (Japan)
Katsuro Oda, Univ. of Tokyo (Japan)
Kazuo Kuroda, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 5633:
Advanced Materials and Devices for Sensing and Imaging II
Anbo Wang; Yimo Zhang; Yukihiro Ishii, Editor(s)

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