Design and analysis of extended depth of focus metalenses for achromatic computational imaging  

作　　者：LUOCHENG HUANA JAMES WHITEHEAD SHANE COLBURN ARKA MAJUMDAR 

机构地区：[1]Department of Electrical and Computer Engineering,Urniversity of Washington,Seattle,Washington 98195,USA [2]Department of Physics,University of Washington,Seatte,Washington 98195,USA

出　　处：《Photonics Research》2020年第10期1613-1623,共11页光子学研究（英文版）

基　　金：UW Reality Lab;Google;Faccbook;Futurewei;Amazon;Samsung Advanced Institute of Technology;NationalScience Foundation(NSF-1825308);Part of this work was conducted at the Washington Nanofabrication Facility/Molecular Analysis Facility,a National Nanotechnology Coordinated Infrastructure(NNCI)sitc ar thc University of Washington,which is supported in part by funds from the National Sceience Foundation(NNCI-1542101,1337840,and 0335765),the Narional Institures of Health,the Molecular Engineering&Sciences Institute,the Clean Energy Institute,the Washington Research Foundation,the M.J.Murdock Charitable Trust,Altarech,Class One Technology,GCE Market,Google,and SPTS.

摘　　要：Metasurface optics have demonstrated vast potential for implementing traditional optical components in an ultracompact and lightweight form factor.Metasurfaces,however,suffer from severe chromatic aberrations,posing serious limitations on their practical use.Eixisting approaches for circumventing this involving dispersion engineering are limited to small apertures and often entail multiple scatterers per unit cell with small feature sizes.Here,we prescnt an alternative technique to mitigatc chromatic aberration and demonstrate high-quality,full-color imaging using extended depth of focus(EDOF)metalenses and computational reconstruction.Previous EDOF metalenses have relied on cubic phase masks,where the image quality suffers from asymmetric artefacts.Here we demonstrate the use of rotationally symmetric masks,including logarithmic-aspherical,and shifted axicon masks,to mitigate this problem.Our work will inspire further development in achromatic metalenses beyond dispersion engineering and hybrid optical-digital metasurface systems.

关 键 词：CHROMATIC DISPERSION OPTICS 

分 类 号：TN256[电子电信—物理电子学]