光学学报, 2011, 31 (9): 0900122, 网络出版: 2011-08-29
铁电晶体畴壁增强非线性性质的研究
Study on Enhanced Nonlinearity in Ferroelectric Domain Wall
非线性光学 铁电晶体畴壁 切伦科夫倍频 定域性 相速度调制 nonlinear optics ferroelectric domain wall Cherenkov second harmonic generation locality phase-velocity modulation
摘要
通过研究畴壁切伦科夫倍频,发现畴壁存在巨大增强的非线性系数。由此造成的畴壁“定域性”使其可以对非线性极化波产生相速度调制,进而影响切伦科夫倍频。提出并证实了极限切伦科夫倍频的存在,并分析了它和准相位匹配倍频产生的区别。
Abstract
By studying Cherenkov second harmonic generation, it is found that there exists significantly enhanced nonlinearity in ferroelectric domain wall. This enhanced nonlinearity leads to locality of domain wall, which will modulate the phase velocity of the nonlinear polarization and further influence the Cherenkov angle. Extreme Cherenkov second harmonic generation is proposed and demonstrated, which is distinguished from quasi-phase-matched second harmonic generation.
陈险峰, 邓学伟, 任怀瑾, 安宁. 铁电晶体畴壁增强非线性性质的研究[J]. 光学学报, 2011, 31(9): 0900122. Chen Xianfeng, Deng Xuewei, Ren Huaijin, An Ning. Study on Enhanced Nonlinearity in Ferroelectric Domain Wall[J]. Acta Optica Sinica, 2011, 31(9): 0900122.