Photorefractive effect in relaxor ferroelectric 0.88Pb(Zn1/3Nb2/3)O3-0.12PbTiO3 single crystal

Photorefractive properties of 0.88Pb(Zn
1/3
Nb
2/3
)O
3
-0.12PbTiO
3
single crystal were investigated by the two-wave coupling experiment. The maximal gain coefficient is 5.5cm
⁻¹
, the effective trap density is 1.21 × 10
¹⁶
cm
⁻³
, and the normalized photorefractive response time under 1W/cm
²
illumination is 1.48s at the wavelength of He-Ne laser. The dominant charge carrier was identified as electron from the direction of two-wave coupling energy transfer.