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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 5 — Feb. 10, 2011
  • pp: 701–709

Design and optimization of a high-efficiency array generator in the mid-IR with binary subwavelength grooves

Guillaume Bloom, Christian Larat, Eric Lallier, Mane-Si Laure Lee-Bouhours, Brigitte Loiseaux, and Jean-Pierre Huignard  »View Author Affiliations

Applied Optics, Vol. 50, Issue 5, pp. 701-709 (2011)

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We have designed a high-efficiency array generator composed of subwavelength grooves etched in a GaAs substrate for operation at 4.5 μm . The method used combines rigorous coupled wave analysis with an optimization algorithm. The optimized beam splitter has both a high efficiency ( 96 % ) and a good intensity uniformity ( 0.2 % ). The fabrication error tolerances are numerically calculated, and it is shown that this subwavelength array generator could be fabricated with current electron beam writers and inductively coupled plasma etching. Finally, we studied the effect of a simple and realistic antireflection coating on the performance of the beam splitter.

© 2011 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
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

Original Manuscript: September 16, 2010
Revised Manuscript: December 21, 2010
Manuscript Accepted: December 27, 2010
Published: February 7, 2011

Guillaume Bloom, Christian Larat, Eric Lallier, Mane-Si Laure Lee-Bouhours, Brigitte Loiseaux, and Jean-Pierre Huignard, "Design and optimization of a high-efficiency array generator in the mid-IR with binary subwavelength grooves," Appl. Opt. 50, 701-709 (2011)

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