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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 23 — Aug. 10, 2007
  • pp: 5755–5761

Design and optimization of space-variant photonic crystal filters

Raymond C. Rumpf, Alok Mehta, Pradeep Srinivasan, and Eric G. Johnson  »View Author Affiliations


Applied Optics, Vol. 46, Issue 23, pp. 5755-5761 (2007)
http://dx.doi.org/10.1364/AO.46.005755


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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.

© 2007 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(220.4000) Optical design and fabrication : Microstructure fabrication

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: December 8, 2006
Revised Manuscript: April 25, 2007
Manuscript Accepted: April 27, 2007
Published: August 8, 2007

Citation
Raymond C. Rumpf, Alok Mehta, Pradeep Srinivasan, and Eric G. Johnson, "Design and optimization of space-variant photonic crystal filters," Appl. Opt. 46, 5755-5761 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-23-5755

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