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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 23, Iss. 14 — Jul. 15, 1998
  • pp: 1081–1083

Blazed binary subwavelength gratings with efficiencies larger than those of conventional échelette gratings

Philippe Lalanne, Simion Astilean, *Pierre Chavel, Edmond Cambril, and Huguette Launois  »View Author Affiliations


Optics Letters, Vol. 23, Issue 14, pp. 1081-1083 (1998)
http://dx.doi.org/10.1364/OL.23.001081


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Abstract

We introduce a new structural cutoff beyond which subwavelength gratings cease to behave as homogeneous media and discuss its effects on the proper selection of the sampling periods of subwavelength diffractive elements. According to this analysis, a 3λ-period blazed binary grating composed of square pillars is designed for He–Ne operation and is fabricated by etching of a TiO>2 layer deposited upon a glass substrate. Its first-order measured diffraction efficiency is 12% larger than the theoretical efficiency of an ideal blazed échelette grating in glass with the same period.

© 1998 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1970) Diffraction and gratings : Diffractive optics

Citation
Philippe Lalanne, Simion Astilean, *Pierre Chavel, Edmond Cambril, and Huguette Launois, "Blazed binary subwavelength gratings with efficiencies larger than those of conventional échelette gratings," Opt. Lett. 23, 1081-1083 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-14-1081

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