诱导光偏振态对激光诱导掺杂铌酸锂晶体畴反转的影响

Influence of Polarization State on Laser-Induced Domain Nucleation in Doped Lithium Niobate

研究了诱导光的偏振态对激光诱导原子数分数为3%掺镁同成分铌酸锂晶体和原子数分数为3%掺铪同成分铌酸锂晶体畴反转的影响。用数字全息干涉测量的方法再现了激光诱导畴反转过程中的相位分布。通过对比线偏振、圆偏振和椭圆偏振不同偏振态诱导光形成的成核场,认为诱导过程中出现的沿z方向的空间电荷场对激光诱导优先畴成核有着非常重要的影响。不仅给出了激光诱导畴工程进一步优化的基本信息,而且为激光诱导畴成核理论的研究提供了新的实验依据。

The influence of polarization state on laser-induced domain nucleation in Mg-doped and Hf-doped LiNbO3 is investigated. The phase distributions during laser-induced domain nucleation are reconstructed by digital holographic interferometry. The comparisons of nucleation field with different polarization states including linear polarization, circular polarization and elliptical polarization are performed. The generated space-charge field along z direction is thought to be important mechanism. Not only the essential information for the future optimization of laser-induced domain engineering is provided, but also the new experimental evidences for the future mechanism investigation of laser-induced domain nucleation are supplied.