title: Pyroelectric effect in green light-assisted domain reversal of Mg-doped LiNbO3 crystals.
abstract: We developed a real-time imaging system to probe the light-assisted domain reversal process of Mg-doped LiNbO(3). An interesting phenomenon was observed where the domain appeared to reverse just after the laser was obscured. An exclusive electric field of about 350 V/mm was measured at 532 nm of light irradiation at an intensity of 6.6 × 10(4) W/cm(2). The exclusive electric field was considered to be produced by a pyroelectric effect owing to a temperature change in the region of irradiation. The temperature change in the light-irradiated region was calculated to be about 2.3°C. Our experimental results indicate that a change of the electric field caused by the pyroelectric effect may play a significant role when LiNbO(3) or other ferroelectric crystals are used under strong light.
authors.affiliation: School of Physics, Nankai University, Tianjin 300071, China.
authors.forename: Shoujun
authors.initials: S
authors.lastname: Zheng
authors.forename: Yongfa
authors.initials: Y
authors.lastname: Kong
authors.forename: Hongde
authors.initials: H
authors.lastname: Liu
authors.forename: Shaolin
authors.initials: S
authors.lastname: Chen
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Shiguo
authors.initials: S
authors.lastname: Liu
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu
mesh_terms: D003116:Color; D003460:Crystallization / Q000379:methods; D004574:Electromagnetic Fields; D004735:Energy Transfer; D008163:Luminescent Measurements / Q000379:methods*; D008274:Magnesium / Q000737:chemistry*; D008422:Materials Testing; D009556:Niobium / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate; D008274:Magnesium