Title

Planar infrared binary phase reflectarray

Authors

Authors

J. Ginn; B. Lail; J. Alda;G. Boreman

Comments

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Abbreviated Journal Title

Opt. Lett.

Keywords

DESIGN; Optics

Abstract

A reflective, binary phase reflectarray is demonstrated in the infrared, at a wavelength of 10.6 mu m. 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. (C) 2008 Optical Society of America.

Journal Title

Optics Letters

Volume

33

Issue/Number

8

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

779

Last Page

781

WOS Identifier

WOS:000255769100007

ISSN

0146-9592

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