Enhancement of photorefractive properties in the relaxor ferroelectric crystal Pb(Zn_(1/3)Nb_(2/3))O_3-PbTiO_3

摘要

We report on the photorefractive properties of rhodium doped relaxor Pb(Zn_(1/3)Nb_(2/3))O_3-PbTiO_3 (PZN-PT) crystals. We have grown two Rh doped 0.91PZN-0.09PT single crystals with different Rh concentrations, one is 0.01 wt.% and the other is 0.2 wt.%, with flux solution method. They were cut, polished, and poled along direction. Two wave mixing experiments are done at the wavelengths 488, 633, 788, and 1064 nm. We obtained the two-wave mixing gain coefficient of 21 cm~(-1) at 488 nm, and improvement of the gain at 788 and 1064 nm. We also measured photovoltaic effect and obtained the maximum value of 900 V/cm at 532nm in 0.2 wt.% Rh doped PZN-PT.