title: Metasurface polarization splitter.
abstract: Polarization beam splitters, devices that separate the two orthogonal polarizations of light into different propagation directions, are among the most ubiquitous optical elements. However, traditionally polarization splitters rely on bulky optical materials, while emerging optoelectronic and photonic circuits require compact, chip-scale polarization splitters. Here, we show that a rectangular lattice of cylindrical silicon Mie resonators functions as a polarization splitter, efficiently reflecting one polarization while transmitting the other. We show that the polarization splitting arises from the anisotropic permittivity and permeability of the metasurface due to the twofold rotational symmetry of the rectangular unit cell. The high polarization efficiency, low loss and low profile make these metasurface polarization splitters ideally suited for monolithic integration with optoelectronic and photonic circuits.This article is part of the themed issue 'New horizons for nanophotonics'.
authors.affiliation: Applied Optics Laboratory, SRI International, Menlo Park, CA 94025, USA brian.slovick@sri.com.
authors.forename: Brian A
authors.initials: BA
authors.lastname: Slovick
authors.affiliation: Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, TN 37212, USA.
authors.forename: You
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Institute for Shock Physics, Washington State University, Pullman, WA 99164, USA.
authors.forename: Zhi Gang
authors.initials: ZG
authors.lastname: Yu
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
authors.forename: Ivan I
authors.initials: II
authors.lastname: Kravchenko
authors.affiliation: Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
authors.forename: Dayrl P
authors.initials: DP
authors.lastname: Briggs
authors.affiliation: Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Parikshit
authors.initials: P
authors.lastname: Moitra
authors.affiliation: Applied Optics Laboratory, SRI International, Menlo Park, CA 94025, USA.
authors.forename: Srini
authors.initials: S
authors.lastname: Krishnamurthy
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37212, USA.
authors.forename: Jason
authors.identifier: http://orcid.org/0000-0001-9943-7170
authors.initials: J
authors.lastname: Valentine
keywords: all-dielectric; metamaterials; metasurfaces