Planar infrared binary phase reflectarray

Optics Letters
James C GinnGlenn D Boreman

Abstract

A reflective, binary phase reflectarray is demonstrated in the infrared, at a wavelength of 10.6 microm. The unique aspect of this work, at this frequency band, is that the specific desired phase shift is achieved using an array of subwavelength metallic patches on top of a ground-plane-backed dielectric stand-off layer. This is an alternative to the usual method of constructing a reflective Fresnel zone plate by means of a given thickness of dielectric. This initial demonstration of the reflectarray approach at infrared is significant in that there is inherent flexibility to create a range of phase shifts by varying the dimensions of the patches. This will allow for a multilevel phase distribution, or even a continuous variation of phase, across an optical surface with only two-dimensional lithography, avoiding the need for dielectric height variations.

Citations

Apr 15, 2010·Optics Express·James GinnGlenn Boreman
Mar 5, 2013·Optics Letters·Mohsen Farmahini-Farahani, Hossein Mosallaei
Sep 29, 2011·Applied Optics·Jose Antonio Gómez-PedreroGlenn Boreman
Jun 21, 2012·Optics Express·Edward C KinzelGlenn D Boreman
Nov 10, 2016·Optics Express·Luyao XuBenjamin S Williams
Feb 8, 2013·Optics Express·Longfang ZouChristophe Fumeaux
Mar 14, 2013·Optics Express·Tiaoming NiuChristophe Fumeaux
Jul 28, 2016·Optics Express·Daniel HeadlandDerek Abbott
Oct 10, 2015·Advanced Materials·Daniel HeadlandSharath Sriram

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