Laboratoire d'Optique Appliquée, ENSTA/CNRS/Ecole Polytechnique, 828, Boulevard des Maréchaux, Palaiseau F-91762, France.
Phys Rev Lett. 2013 Mar 1;110(9):097601. doi: 10.1103/PhysRevLett.110.097601.
We report on a novel nonlinear optical phenomenon, coined as ciliary white light, during laser ablation of transparent dielectrics. It is observed in 14 different transparent materials including glasses, crystals, and polymers. This phenomenon is also universal with respect to laser polarization, pulse duration, and focusing geometry. We interpret its formation in terms of the nonlinear diffraction of the laser generated white light by the ablation crater covered by nanostructures. It carries rich information on the damage profile and morphology dynamics of the ablated surface, providing a real time in situ observation of the laser ablation process.
我们报告了一种新的非线性光学现象，称为纤毛白光，它在透明介质的激光烧蚀过程中产生。我们在 14 种不同的透明材料中观察到了这一现象，包括玻璃、晶体和聚合物。这种现象对于激光偏振、脉冲持续时间和聚焦几何形状也是普遍存在的。我们根据由纳米结构覆盖的烧蚀坑对激光产生的白光的非线性衍射来解释其形成。它携带了有关烧蚀表面的损伤轮廓和形态动力学的丰富信息，提供了激光烧蚀过程的实时原位观察。
