Qi Rui, Gbur Greg
Opt Lett. 2023 Aug 15;48(16):4284-4287. doi: 10.1364/OL.497243.
Superoscillations are oscillations of a band limited waveform with a local frequency higher than the bandlimit. Spatial superoscillations show great potential for performing super-resolution imaging. However, these superoscillatory waveforms are inevitably surrounded by high intensity sidelobes which severely limit the usable super-resolved area of an image. In this study, we demonstrate how polarization engineering can be used in some circumstances to suppress superoscillation sidelobes, taking advantage of the transverse wave nature of light. We illustrate the principle by a model super-resolution imaging system that can image Rayleigh scatterers with separations smaller than the classic Rayleigh criterion.
超振荡是指带宽受限波形的振荡，其局部频率高于带宽限制。空间超振荡在超分辨率成像方面具有巨大潜力。然而，这些超振荡波形不可避免地被高强度旁瓣所包围，这严重限制了图像可用的超分辨区域。在本研究中，我们展示了在某些情况下如何利用光的横波性质，通过偏振工程来抑制超振荡旁瓣。我们通过一个模型超分辨率成像系统来说明这一原理，该系统能够对间距小于经典瑞利判据的瑞利散射体进行成像。
