介绍了光学超振荡的原理及设计方法, 利用纯振幅调制的空间光调制器(SLM)-数字微镜器件(DMD), 从实验上获得局部超分辨的超振荡光场, 并采用空间频谱分析的方法进行验证。 实验结果表明, 产生的超振荡光场中超振荡区域的特征尺寸为衍射极限的60%, 经空间频谱的分析可知, 所产生的超振荡光场中并没有超过衍射极限的高空间频率成分产生。

The principle and design method of optical super-oscillation are introduced. A superoscillatory optical field with a local superresolution is experimentally obtained by pure amplitude-modulated spatial light modulator (SLM) and digital micro-mirror device (DMD). The experimental results show that the characteristic size of the superoscillatory field in the generated superresolution optical field is sixty percent of diffraction limit. The analysis of the spatial spectra used to validate the experimental results shows that the superoscillatory optical field does not generate spatial high frequency components beyond the diffraction limit.