Ma Qian, Qian Haoliang, Montoya Sergio, Bao Wei, Ferrari Lorenzo, Hu Huan, Khan Emroz, Wang Yuan, Fullerton Eric E, Narimanov Evgenii E, Zhang Xiang, Liu Zhaowei
Electrical and Computer Engineering , University of California, San Diego , 9500 Gilman Drive , La Jolla , California 92093 , United States.
Mechanical Engineering , University of California, Berkeley , 5130 Etcheverry Hall , Berkeley , California 94720 , United States.
ACS Nano. 2018 Nov 27;12(11):11316-11322. doi: 10.1021/acsnano.8b06026. Epub 2018 Oct 22.
An optical metamaterial is capable of manipulating light in nanometer scale that goes beyond what is possible with conventional materials. Taking advantage of this special property, metamaterial-assisted illumination nanoscopy (MAIN) possesses tremendous potential to extend the resolution far beyond conventional structured illumination microscopy. Among the available MAIN designs, hyperstructured illumination that utilizes strong dispersion of a hyperbolic metamaterial (HMM) is one of the most promising and practical approaches, but it is only theoretically studied. In this paper, we experimentally demonstrate the concept of hyperstructured illumination. A ∼80 nm resolution has been achieved in a well-known Ag/SiO multilayer HMM system by using a low numerical aperture objective (NA = 0.5), representing a 6-fold resolution enhancement of the diffraction limit. The resolution can be significantly improved by further material optimization.
光学超材料能够在纳米尺度上操控光，这是传统材料无法做到的。利用这一特殊性质，超材料辅助照明纳米显微镜（MAIN）具有将分辨率大幅提高到远超传统结构照明显微镜的巨大潜力。在现有的MAIN设计中，利用双曲线超材料（HMM）的强色散特性的超结构化照明是最具前景和实用性的方法之一，但目前仅停留在理论研究阶段。在本文中，我们通过实验证明了超结构化照明的概念。在一个著名的Ag/SiO多层HMM系统中，使用低数值孔径物镜（NA = 0.5）实现了约80纳米的分辨率，这意味着衍射极限提高了6倍。通过进一步优化材料，分辨率可以得到显著提升。
