Improving resolution of superlens based on solid immersion mechanism
Zhanlei Hao(郝占磊)†, Yangyang Zhou(周杨阳)†, Bei Wu(吴贝),Yineng Liu(刘益能)‡, and Huanyang Chen(陈焕阳)§
Institute of Electromagnetics and Acoustics and Department of Physics, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
Abstract 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.
Fund: 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), and the Fundamental Research Funds for the Central Universities (Grant Nos. 20720220033 and 20720200074).
Zhanlei Hao(郝占磊), Yangyang Zhou(周杨阳), Bei Wu(吴贝),Yineng Liu(刘益能), and Huanyang Chen(陈焕阳) Improving resolution of superlens based on solid immersion mechanism 2023 Chin. Phys. B 32 064211
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