Inverse design of metasurfaces with non-local interactions

作     者：Haogang Cai Srilok Srinivasan David A.Czaplewski Alex B.F.Martinson David J.Gosztola Liliana Stan Troy Loeffler Subramanian K.R.S.Sankaranarayanan Daniel López 

作者机构：Center for Nanoscale MaterialsArgonne National LaboratoryLemontIL 60439USA Materials Science DivisionArgonne National LaboratoryLemontIL 60439USA Department of Mechanical and Industrial EngineeringUniversity of IllinoisChicagoIL 60607USA Tech4Health Institute and Department of RadiologyNYU Langone HealthNew YorkNY 10016USA 

出 版 物：《npj Computational Materials》 (计算材料学（英文）)

年 卷 期：2020年第6卷第1期

页      面：669-676页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 070101[理学-基础数学] 

基　　金：This work was performed at the Center for Nanoscale Materials,a U.S.Department of Energy Office of Science User Facility,and supported by the U.S.Department of Energy,Office of Science,under Contract No.DE-AC02-06CH11357 This research used resources of the National Energy Research Scientific Computing Center,a U.S.Department of Energy Office of Science User Facility,supported by the U.S.Department of Energy,Office of Science,under Contract No.DE-AC02-05CH11231 

主　　题：local surfaces eliminate 

摘      要：Conventional metasurfaces have demonstrated efficient wavefront manipulation by using thick and high-aspect-ratio nanostructures in order to eliminate interactions between adjacent phase-shifter ***-than-wavelength dielectric metasurfaces are highly desirable because they can facilitate fabrication and integration with both electronics and mechanically tunable ***,because their constitutive phase-shifter elements exhibit strong electromagnetic coupling between neighbors,the design requires a global optimization methodology that considers the non-local ***,we propose a global evolutionary optimization approach to inverse design non-local *** optimal designs are experimentally validated,demonstrating the highest efficiencies for the thinnest transmissive metalenses reported to-date for visible *** a departure from conventional design methods based on the search of a library of pre-determined and independent meta-atoms,we take full advantage of the strong interactions among nanoresonators to improve the focusing efficiency of metalenses and demonstrate that efficiency improvements can be obtained by lowering the metasurface filling factors.