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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 23 — Dec. 1, 2013
  • pp: 5000–5003

Increase of spatial coherence by subwavelength metallic gratings

Toni Saastamoinen and Hanna Lajunen  »View Author Affiliations

Optics Letters, Vol. 38, Issue 23, pp. 5000-5003 (2013)

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We study the coherence changes in partially coherent beams transmitted through binary metallic gratings. The interaction of Gaussian Schell-model beams with grating structures supporting surface plasmons is rigorously modeled using the Fourier modal method and the coherent mode representation of partially coherent fields. Our numerical results show that, by choosing suitable parameters for the grating, the degree of coherence of the beam can be significantly increased. The studied approach offers new possibilities to alter the coherence properties of fields using nanophotonic components.

© 2013 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(240.6680) Optics at surfaces : Surface plasmons
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Coherence and Statistical Optics

Original Manuscript: July 5, 2013
Revised Manuscript: October 16, 2013
Manuscript Accepted: October 22, 2013
Published: November 21, 2013

Toni Saastamoinen and Hanna Lajunen, "Increase of spatial coherence by subwavelength metallic gratings," Opt. Lett. 38, 5000-5003 (2013)

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