Effect of dopants on the photorefractive effect in 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3

Details Effect of dopants on the photorefractive effect in 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 Effect of dopants on the photorefractive effect in 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5633..249s&link_type=abstract

Advanced Materials and Devices for Sensing and Imaging II. Edited by Wang, Anbo; Zhang, Yimo; Ishii, Yukihiro. Proceedings of

Computer Science

Scientific paper

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.

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