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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 23, Iss. 7 — Apr. 1, 1998
  • pp: 552–554

High-efficiency subwavelength diffractive element patterned in a high-refractive-index material for 633 nm

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


Optics Letters, Vol. 23, Issue 7, pp. 552-554 (1998)
http://dx.doi.org/10.1364/OL.23.000552


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Abstract

We propose the use of high-index materials for the fabrication of subwavelength diffractive components operating in the visible domain. This approach yields a reduction of fabrication constraints and an improvement of theoretical performance. A blazed grating with subwavelength binary features and with a period of 5.75 wavelengths is designed and fabricated in a TiO2 layer coated upon a glass substrate. The first-order diffraction efficiency measured with a He–Ne laser beam is 83%, which is slightly larger than that achieved theoretically by the best standard (continuous profile) blazed grating fabricated in glass with the same period.

© 1998 Optical Society ofAmerica

OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(050.2770) Diffraction and gratings : Gratings

Citation
Simion Astilean, Philippe Lalanne, Pierre Chavel, Edmond Cambril, and Huguette Launois, "High-efficiency subwavelength diffractive element patterned in a high-refractive-index material for 633 nm," Opt. Lett. 23, 552-554 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-7-552

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