Planar infrared binary phase reflectarray

    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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