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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 27 — Sep. 20, 2009
  • pp: 5121–5126

Broadband IR polarizing beam splitter using a subwavelength-structured one-dimensional photonic-crystal layer embedded in a high-index prism

H. K. Khanfar and R. M. A. Azzam  »View Author Affiliations

Applied Optics, Vol. 48, Issue 27, pp. 5121-5126 (2009)

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An iterative procedure for the design of a polarizing beam splitter (PBS) that uses a form-birefringent, subwavelength-structured, one-dimensional photonic-crystal layer (SWS 1-D PCL) embedded in a high-index cubical prism is presented. The PBS is based on index matching and total transmission for the p polarization and total internal reflection for the s polarization at the prism–PCL interface at 45 ° angle of incidence. A high extinction ratio in reflection ( > 50 dB ) over the 4 12 μm IR spectral range is achieved using a SWS 1-D PCL of ZnTe embedded in a ZnS cube within an external field of view of ± 6.6 and in the presence of grating filling factor errors of up to ± 10 % . Comparable results, but with wider field of view, are also obtained with a Ge PCL embedded in a Si prism.

© 2009 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(230.1360) Optical devices : Beam splitters
(260.5430) Physical optics : Polarization
(310.1620) Thin films : Interference coatings

ToC Category:
Optical Devices

Original Manuscript: July 16, 2009
Revised Manuscript: August 22, 2009
Manuscript Accepted: August 24, 2009
Published: September 10, 2009

H. K. Khanfar and R. M. A. Azzam, "Broadband IR polarizing beam splitter using a subwavelength-structured one-dimensional photonic-crystal layer embedded in a high-index prism," Appl. Opt. 48, 5121-5126 (2009)

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