Hu Jingtian, Wang Danqing, Bhowmik Debanjan, Liu Tingting, Deng Shikai, Knudson Michael P, Ao Xianyu, Odom Teri W
Centre for Optical and Electromagnetic Research and South China Academy of Advanced Optoelectronics , South China Normal University , Guangzhou , Guangdong 510006 China.
ACS Nano. 2019 Apr 23;13(4):4613-4620. doi: 10.1021/acsnano.9b00651. Epub 2019 Mar 26.
This paper describes a reconfigurable metalens system that can image at visible wavelengths based on arrays of coupled plasmonic nanoparticles. These lenses manipulated the wavefront and focused light by exciting surface lattice resonances that were tuned by patterned polymer blocks on single-particle sites. Predictive design of the dielectric nanoblocks was performed using an evolutionary algorithm to create a range of three-dimensional focusing responses. For scalability, we demonstrated a simple technique for erasing and writing the polymer nanostructures on the metal nanoparticle arrays in a single step using solvent-assisted nanoscale embossing. This reconfigurable materials platform enables tunable focusing with diffraction-limited resolution and offers prospects for highly adaptive, compact imaging.
本文描述了一种基于耦合等离子体纳米颗粒阵列的可重构超透镜系统，该系统能够在可见光波长下成像。这些透镜通过激发表面晶格共振来操纵波前并聚焦光线，而表面晶格共振是由单粒子位点上的图案化聚合物块来调节的。使用进化算法对介电纳米块进行预测设计，以创建一系列三维聚焦响应。为了实现可扩展性，我们展示了一种简单的技术，即使用溶剂辅助纳米压印在单个步骤中擦除和写入金属纳米颗粒阵列上的聚合物纳米结构。这种可重构材料平台能够实现具有衍射极限分辨率的可调聚焦，并为高度自适应、紧凑的成像提供了前景。
