电磁超分辨率特性研究概述

s the resolution of traditional imaging, limited by the Rayleigh criterion, can't meet the actual application yet, breaking through the diffraction limit to realize super-resolution becomes more and more essential.The background and its applications of super resolution techniques are reviewed briefly in this paper.Some methods that can realize super resolution(near-field optical microscope, left-handed material, surface plasmons, mode conversion, super-oscillation theory，time reversal) are discussed in detail,including their research status,basic principles and relative merits.At last a conclusion and some advice are given.