Broadband metasurface aberration correctors for hybrid meta/refractive MWIR lenses

被引:19
|
作者
Shih, Ko-Han [1 ]
Renshaw, C. Kyle [1 ,2 ,3 ]
机构
[1] Univ Cent Florida, Coll Opt & Photon, CREOL, Orlando, FL 32816 USA
[2] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA
[3] Univ Cent Florida, Dept Elect & Comp Engn, Orlando, FL 32816 USA
关键词
METALENS;
D O I
10.1364/OE.460941
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A method for designing multi-metasurface layouts for optical aberration correction is presented. All-dielectric metasurfaces are combined with conventional refractive optics to form a hybrid lens. The optical power of a hybrid lens is primarily provided by refractive optics, and metasurfaces are optimized to control optical aberrations. This approach greatly reduces the magnitude of phase gradient required for a largescale metasurface and hence its diffraction loss. An inverse design technique is incorporated to optimize all physical parameters on a metasurface to minimize image spots across all sampling field angles and wavelengths. This approach is put to test by designing a hybrid lens composed of a midwave infrared refractive lens followed by a pair of metasurfaces. Moreover, we demonstrate the working bandwidth of the hybrid lens can be further extended by reducing phase dispersion introduced by a metasurface using holey meta-atoms instead of pillar meta-atoms. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码:28438 / 28453
页数:16
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