论文标题
携带轨道角动量的中红外光的上式检测
Up-conversion detection of mid-infrared light carrying orbital angular momentum
论文作者
论文摘要
频率上转换是一种有效的中红外（MIR）检测方法，它通过将长波长光子转换为可见的域，在该域很容易获得有效的检测器。在这里，我们从差异频率生成过程中生成携带轨道角动量（OAM）的miR光，并通过在散装准阶段匹配晶体中通过总和频率转换来进行上流。从miR到可见的最大量子转换效率分别为34.0％，10.4％和3.5％，拓扑电荷分别为0、1和2，这是通过使用优化的强泵灯来实现的。我们还使用特殊设计的干涉仪验证OAM保护，结果与数值模拟非常吻合。我们的研究开辟了产生，操纵和检测带有OAM的MIR光的可能性，并在MIR制度中具有巨大的光学通信和遥感潜力。
Frequency up-conversion is an effective method of mid-infrared (MIR) detection by converting the long-wavelength photons to the visible domain, where efficient detectors are readily available. Here, we generate the MIR light carrying orbital angular momentum (OAM) from a difference frequency generation process and perform the up-conversion of it via sum frequency conversion in a bulk quasi-phase-matching crystal. The maximum quantum conversion efficiencies from MIR to visible are 34.0%, 10.4%, and 3.5% for light with topological charges of 0, 1, and 2, respectively, which is achieved by utilizing an optimized strong pump light. We also verify the OAM conservation with a specially designed interferometer, and the results agree well with the numerical simulations. Our study opens up the possibilities for generating, manipulating, and detecting MIR light that carries OAM, and will have great potential for optical communications and remote sensing in the MIR regime.
