Design and optimization of space-variant photonic crystal filters

    Authors

    R. C. Rumpf; A. Mehta; P. Srinivasan;E. G. Johnson

    Comments

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    Abbreviated Journal Title

    Appl. Optics

    Keywords

    COUPLED-WAVE ANALYSIS; IMPLEMENTATION; GRATINGS; Optics

    Abstract

    A space-variant photonic crystal filter is designed and optimized that may be placed over a detector array to perform filtering functions tuned for each pixel. The photonic crystal is formed by etching arrays of holes through a multilayer stack of alternating high and low refractive index materials. Position of a narrow transmission notch within a wide reflection band is varied across the device aperture by adjusting the diameter of the holes. Numerical simulations are used to design and optimize the geometry of the photonic crystal. As a result of physics inherent in the etching process, the diameter of the holes reduces with depth, producing a taper. Optical performance was found to be sensitive to the taper, but a method for compensation was developed where film thickness is varied through the device. (c) 2007 Optical Society of America.

    Journal Title

    Applied Optics

    Volume

    46

    Issue/Number

    23

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    5755

    Last Page

    5761

    WOS Identifier

    WOS:000249315300027

    ISSN

    1559-128X

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