An achromatic metalens in the near-infrared region with an array based on a single nano-rod unit
An achromatic metalens in the near-infrared region with an array based on a single nano-rod unit
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近红外区域的消色差超透镜，具有基于单个纳米棒单元的阵列
DOI：
10.7567/1882-0786/ab34c4
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发表时间：
2019
影响因子：
2.3
通讯作者：
Zhang Dawei
中科院分区：
文献类型：
--
作者：
Yu Binbin;Wen Jing;Chen Xu;Zhang Dawei
将纳米天线阵列封装在超薄层中的超表面在成像、显示、光学全息、偏振光、复杂光场操纵等多领域显示出巨大的应用潜力。与以往基于集成谐振单元单元的消色差设计不同，提出了一种基于单天线单元阵列的超简单近红外消色差超透镜结构，其数值孔径为0.3，波长范围为1 ~ 1.2 μm。近红外区域焦点完美重叠的消色差特性为创新的扁平和低成本近红外光学元件开辟了道路。
Metasurfaces which encompass nanoantenna arrays in ultra-thin layers exhibit great application potentials in versatile areas for example imaging, displays, optical holograms, polarizers, complex optical field manipulations and so on. Different from previous achromatic designs based on integrated-resonant unit elements, an ultra-simple configuration of a near-infrared achromatic metalens with an array based on a single antenna element is proposed and demonstrated with a numerical aperture = 0.3 in the wavelength range from 1 to 1.2 μm. The achromatic property with the perfect overlap of the focal points in the near-infrared region opens an avenue for innovative flat and low-cost near-infrared optical components.