We propose a new approach for subwavelength imaging using a nonlinear negative refraction lens based on four wave mixing process. Here a thin metal film is implemented as the nonlinear negative refraction lens to bend the incident signal waves to negatively refracted FWM ones according to the partial phase matching along its surface. The imaging process can be described by the nonlinear optical transfer function over the entire spatial spectra including the evanescent ones. Analytical calculations and numerical simulations are performed to demonstrate the capability of such imaging. Compared with the existing techniques, our method works on non-resonant condition over a broad range of spectrum, therefore, it may open up a new avenue for super-resolution imaging applications.

中文翻译：

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非线性负折射透镜通过四波混频进行亚波长成像

我们提出了一种基于非线性负折射透镜的基于四波混频过程的亚波长成像新方法。此处，将金属薄膜用作非线性负折射透镜，以根据沿其表面的部分相位匹配将入射信号波弯曲为负折射FWM。成像过程可以通过包括spatial逝光谱在内的整个空间光谱的非线性光学传递函数来描述。进行分析计算和数值模拟以证明这种成像的能力。与现有技术相比，我们的方法可以在很宽的频谱范围内的非共振条件下工作，因此，它可能为超分辨率成像应用开辟新的途径。