论文标题
轨道角动量光谱的非线性操纵，在准螺旋形的晶体中，第二和第三次谐波产生
Nonlinear manipulation of orbital angular momentum spectra with second- and third- harmonic generation in a quasi-periodically poled crystal
论文作者
论文摘要
光学轨道角动量（OAM）作为重要程度的光自由度，由于其自然离散无限尺寸的内在特征而引起了广泛的关注。对绿色光谱的操纵对于从经典到量子领域的许多令人印象深刻的应用至关重要，尤其是对绿色绿色光谱的非线性操纵。在这里，我们通过在准晶状体磷酸钾的单个非线性晶体中使用同时使用的第二和第三次谐波来实现非线性操纵，以对具有多种OAM光谱的基本波，尤其是对于第二和第三谐波的定制OAM光谱。实验结果证实了理论预测。我们的方法不仅提供了一种新型的方法来操纵很难直接生成的新较短波长的OAM光谱，而且还可以在经典光学器件和量子光学的高维信息处理中找到新的应用程序。
Optical orbital angular momentum (OAM), as an important degree of freedom of light, has been attracted extensive attention, due to its intrinsic feature of natural discrete infinite dimension. Manipulation of OAM spectra is crucial for many impressive applications from classical to quantum realms, in particular, nonlinear manipulation of OAM spectra. Here we realized the nonlinear manipulation of OAM spectra by using the simultaneous second- and third-harmonic generation in a single nonlinear crystal of quasi-periodically poled potassium titanyl phosphate, for fundamental waves with a variety of OAM spectra, especially for customized OAM spectra of the second and third harmonics. The experimental results confirmed the theoretical predictions. Our approach not only provides a novel way to manipulate OAM spectra at new shorter wavelengths that are hard to be directly generated, but also may find new applications towards multiplexing in classical optics and high-dimensional information processing in quantum optics.
