Multifunctional interleaved geometric-phase dielectric metasurfaces  

作　　者：Elhanan Maguid Igor Yulevich Michael Yannai Vladimir Kleiner Mark L Brongersma Erez Hasman 

机构地区：[1]Micro and Nanooptics Laboratory,Faculty of Mechanical Engineering,and Russell Berrie Nanotechnology Institute,Technion-Israel Institute of Technology,Haifa 32000,Israel [2]Geballe Laboratory for Advanced Materials,Stanford University,476 Lomita Mall,Stanford,CA 94305,USA

出　　处：《Light(Science & Applications)》2017年第1期668-674,共7页光（科学与应用)（英文版）

基　　金：supported by the Israel Science Foundation(ISF);the United States—Israel Binational Science Foundation(BSF);the Israel Ministry of Science,Technology and Space,and KLA-Tencor.

摘　　要：Shared-aperture technology for multifunctional planar systems,performing several simultaneous tasks,was first introduced in the field of radar antennas.In photonics,effective control of the electromagnetic response can be achieved by a geometric-phase mechanism implemented within a metasurface,enabling spin-controlled phase modulation.The synthesis of the shared-aperture and geometric-phase concepts facilitates the generation of multifunctional metasurfaces.Here shared-aperture geometric-phase metasurfaces were realized via the interleaving of sparse antenna sub-arrays,forming Si-based devices consisting of multiplexed geometric-phase profiles.We study the performance limitations of interleaved nanoantenna arrays by means of a Wigner phasespace distribution to establish the ultimate information capacity of a metasurface-based photonic system.Within these limitations,we present multifunctional spin-dependent dielectric metasurfaces,and demonstrate multiple-beam technology for optical rotation sensing.We also demonstrate the possibility of achieving complete real-time control and measurement of the fundamental,intrinsic properties of light,including frequency,polarization and orbital angular momentum.

关 键 词：geometric phase metasurface MULTIFUNCTIONAL shared aperture SPECTROPOLARIMETRY spin-optics Wigner distribution 

分 类 号：O43[机械工程—光学工程]