光学
小型化
波长
平面的
材料科学
光学(聚焦)
波前
分辨率(逻辑)
光电子学
光谱分辨率
图像拼接
物理
谱线
计算机科学
纳米技术
人工智能
计算机图形学(图像)
天文
作者
Mohammadreza Khorasaninejad,Wei Ting Chen,Jaewon Oh,Federico Capasso
出处
期刊:Nano Letters
[American Chemical Society]
日期:2016-05-03
卷期号:16 (6): 3732-3737
被引量:180
标识
DOI:10.1021/acs.nanolett.6b01097
摘要
Metasurfaces have opened a new frontier in the miniaturization of optical technology by allowing exceptional control over the wavefront. Here, we demonstrate off-axis meta-lenses that simultaneously focus and disperse light of different wavelengths with unprecedented spectral resolution. They are designed based on the geometric phase via rotated silicon nanofins and can focus light at angles as large as 80°. Due to the large angle focusing, these meta-lenses have superdispersive characteristics (0.27 nm/mrad) that make them capable of resolving wavelength differences as small as 200 pm in the telecom region. In addition, by stitching several meta-lenses together, we maintain a high spectral resolution for a wider wavelength range. The meta-lenses have measured efficiencies as high as 90% in the wavelength range of 1.1 to 1.6 μm. The planar and compact configuration together with high spectral resolution of these meta-lenses has significant potential for emerging portable/wearable optics technology.
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