Vyunishev A M, Myslivets S A, Fokin V A, Volochaev M N, Smolyarova T E, Radionov N V, Zaitsev A I, Arkhipkin V G, Chirkin A S
Opt Lett. 2019 Aug 1;44(15):3761-3764. doi: 10.1364/OL.44.003761.
A method for functional patterning of facets of a nonlinear crystal using focused ion beam milling has been developed. The near-field diffraction on periodic gratings has been experimentally and theoretically studied. The periodicity of the structure enables Talbot self-imaging at the fundamental and second-harmonic frequencies simultaneously. Spatial interference patterns for both harmonic frequencies are individual ones, which can enable the higher-accuracy optical testing, coupling the radiation at both frequencies, and wavelength-division demultiplexing. The impact of the aperture effect on a Talbot carpet is discussed.
已开发出一种使用聚焦离子束铣削对非线性晶体小面进行功能图案化的方法。对周期性光栅上的近场衍射进行了实验和理论研究。该结构的周期性能够在基频和二次谐波频率上同时实现塔尔博特自成像。两种谐波频率的空间干涉图样都是独特的，这可以实现更高精度的光学测试、耦合两种频率的辐射以及波分复用。讨论了孔径效应对塔尔博特光场分布的影响。
