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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 24 — Aug. 20, 2012
  • pp: 5897–5902

Design, manufacturing, and performance analysis of mid-infrared achromatic half-wave plates with diamond subwavelength gratings

Christian Delacroix, Pontus Forsberg, Mikael Karlsson, Dimitri Mawet, Olivier Absil, Charles Hanot, Jean Surdej, and Serge Habraken  »View Author Affiliations


Applied Optics, Vol. 51, Issue 24, pp. 5897-5902 (2012)
http://dx.doi.org/10.1364/AO.51.005897


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Abstract

In this paper, we present a solution for creating robust monolithic achromatic half-wave plates (HWPs) for the infrared, based on the form birefringence of subwavelength gratings (SWGs) made out of diamond. We use the rigorous coupled wave analysis to design the gratings. Our analysis shows that diamond, besides its outstanding physical and mechanical properties, is a suitable substrate to manufacture mid-infrared HWPs, thanks to its high refractive index, which allows etching SWGs with lower aspect ratio. Based on our optimized design, we manufactured a diamond HWP for the 11–13.2 μm region, with an estimated mean retardance 3.143±0.061rad (180.08±3.51°). In addition, an antireflective grating was etched on the backside of the wave plate, allowing a total transmittance between 89% and 95% over the band.

© 2012 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.5080) Diffraction and gratings : Phase shift
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: May 3, 2012
Revised Manuscript: July 10, 2012
Manuscript Accepted: July 10, 2012
Published: August 16, 2012

Citation
Christian Delacroix, Pontus Forsberg, Mikael Karlsson, Dimitri Mawet, Olivier Absil, Charles Hanot, Jean Surdej, and Serge Habraken, "Design, manufacturing, and performance analysis of mid-infrared achromatic half-wave plates with diamond subwavelength gratings," Appl. Opt. 51, 5897-5902 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-24-5897

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