Noncolinear Second-Harmonic Generation Pairs and Their Scatterings in Nd3+:SBN Crystals with Needle-Like Ferroelectric Domains  

作　　者：冯天闰 康慧珍 冯蕾 杨嘉 张天浩 宋峰 许京军 田建国 L.I.Ivleva 

机构地区：[1]Photonics Research Center,School of Physics,The MOE Key Lab of Weak-Light Nonlinear Photonics,and Tianjin Key Lab of Photonics Materials and Technology for Information Science,Nankai University,Tianjin 300071 [2]Basic Department of Military Transportation College,Tianjin 300161 [3]Institute for General Physics of the Russian Academy of Science,Moscow 119991,Russia

出　　处：《Chinese Physics Letters》2018年第3期35-38,共4页中国物理快报（英文版）

基　　金：National Natural Science Foundation of China under Grant No 61675101

摘　　要：Second-harmonic generation in Nd3＋ ：SBN crystal with needle-like ferroelectric with aperiodic domain structures is investigated. Two pairs of second harmonic （SH） waves appearing in lines are observed in unpoled Nd3＋ ：SBN crystals with aperiodic needle-like domains. A pair of SH waves emit from the exit face, whose intensities are angle-dependent. The angular dependence is corresponding to the spatial frequency spectrum of the aperiodic domain structure. Another pair of SH waves emit from both the side surfaces, which are mainly the scattered SH waves by needle-like domain walls and obey the theory of Rayleigh scattering.Second-harmonic generation in Nd3＋ ：SBN crystal with needle-like ferroelectric with aperiodic domain structures is investigated. Two pairs of second harmonic （SH） waves appearing in lines are observed in unpoled Nd3＋ ：SBN crystals with aperiodic needle-like domains. A pair of SH waves emit from the exit face, whose intensities are angle-dependent. The angular dependence is corresponding to the spatial frequency spectrum of the aperiodic domain structure. Another pair of SH waves emit from both the side surfaces, which are mainly the scattered SH waves by needle-like domain walls and obey the theory of Rayleigh scattering.

关 键 词：SBN Crystals with Needle-Like Ferroelectric Domains SH QPM SHG 

分 类 号：O73[理学—晶体学]