Improving resolution of superlens based on solid immersion mechanism  

作　　者：郝占磊 周杨阳 吴贝 刘益能 陈焕阳 Zhanlei Hao;Yangyang Zhou;Bei Wu;Yineng Liu;Huanyang Chen(Institute of Electromagnetics and Acoustics and Department of Physics,College of Physical Science and Technology,Xiamen University,Xiamen 361005,China)

机构地区：[1]Institute of Electromagnetics and Acoustics and Department of Physics,College of Physical Science and Technology,Xiamen University,Xiamen 361005,China

出　　处：《Chinese Physics B》2023年第6期21-26,共6页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China (Grant No. 2020YFA0710100);the National Natural Science Foundation of China (Grant Nos. 92050102 and 11874311);the Fundamental Research Funds for the Central Universities (Grant Nos. 20720220033 and 20720200074)。

摘　　要：Super-resolution imaging with superlens has been one of the fundamental research topics. Unfortunately, the resolution of superlens is inevitably restrained by material loss. To address the problem, we introduce the solid immersion mechanism into the slab superlens and the cylindrical superlens. The proposed solid immersion slab superlens(SISSL) and the solid immersion cylindrical superlens(SICSL) can improve the resolution by converting evanescent wave to propagating wave using high refractive index materials. From the perspective of applications, the cylindrical superlens with finite cross section and the ability of magnification or demagnification has more advantages than the slab superlens. Therefore,we focus on demonstrating analytically the super-resolution imaging of SICSL. Due to the impedance mismatching caused by solid immersion mechanism, the whispering gallery modes(WGMs) are excited between SICSL and the air interface.We clarify the excitation conditions of WGMs and analyze their influence on the imaging quality of SICSL. The SISSL and SICSL may pave a way to apply in lithography technique and real-time biomolecular imaging in future.

关 键 词：super-resolution imaging material loss solid immersion cylindrical superlens whispering gallery modes 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TH74[自动化与计算机技术—计算机科学与技术]