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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 26, Iss. 3 — Mar. 1, 2009
  • pp: 676–679

Experimental demonstration of ultrasharp unpolarized filtering by resonant gratings at oblique incidence

Olga Boyko, Fabien Lemarchand, Anne Talneau, Anne-Laure Fehrembach, and Anne Sentenac  »View Author Affiliations


JOSA A, Vol. 26, Issue 3, pp. 676-679 (2009)
http://dx.doi.org/10.1364/JOSAA.26.000676


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Abstract

The peaks in the reflectivity spectrum of waveguide gratings observed when the incident beam couples to a mode of the structure are promising features for many applications. However their weak angular tolerance and their strong polarization sensitivity, especially under oblique incidence, limit their interest in practice. These problems can be overcome by forming slow degenerate modes outside the usual high symmetry points of the Brillouin zone with a complex periodic pattern [ Fehrembach, Appl. Phys. Lett. 86, 121105 (2005) ]. We show experimentally that spectrally sharp, λ Δ λ 4000 , polarization-independent, angularly tolerant optical resonances can be obtained by exciting these modes under oblique incidence.

© 2009 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.4000) Optical devices : Microstructure fabrication
(260.5740) Physical optics : Resonance
(310.2790) Thin films : Guided waves

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 9, 2009
Manuscript Accepted: January 20, 2009
Published: February 26, 2009

Citation
Olga Boyko, Fabien Lemarchand, Anne Talneau, Anne-Laure Fehrembach, and Anne Sentenac, "Experimental demonstration of ultrasharp unpolarized filtering by resonant gratings at oblique incidence," J. Opt. Soc. Am. A 26, 676-679 (2009)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-26-3-676


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References

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  16. The angular tolerance of the resonance is estimated by calculating the FWHM of the reflectivity peak with respect to the incidence angle when the grating is illuminated by a plane wave.
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