Bahabad Alon, Cohen Oren, Murnane Margaret M, Kapteyn Henry C
Department of Physics and JILA, University of Colorado at Boulder and NIST, Boulder, CO 80309, USA.
Opt Lett. 2008 Sep 1;33(17):1936-8. doi: 10.1364/ol.33.001936.
Quasi-phase matching schemes employing quasi-periodic or random spatial modulations, previously applied to perturbative nonlinear optics, are demonstrated theoretically for the extreme nonlinear optical process of high harmonic generation. We show that quasi-periodic quasi-phase matching of high harmonic generation can be used for simultaneous enhancement of arbitrarily chosen spectral regions. We also demonstrate enhancement of a single extremely wide bandwidth using random quasi-phase matching.
采用准周期或随机空间调制的准相位匹配方案，此前已应用于微扰非线性光学，本文从理论上证明了其可用于高次谐波产生这一极端非线性光学过程。我们表明，高次谐波产生的准周期准相位匹配可用于同时增强任意选定的光谱区域。我们还展示了利用随机准相位匹配增强单个极宽带宽的情况。
