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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 11 — May. 24, 2010
  • pp: 11683–11688

Planar focusing elements using spatially varying near-resonant aperture arrays

X. M. Goh, L. Lin, and A. Roberts  »View Author Affiliations


Optics Express, Vol. 18, Issue 11, pp. 11683-11688 (2010)
http://dx.doi.org/10.1364/OE.18.011683


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Abstract

Resonances in subwavelength apertures are accompanied by wavelength-dependent phase shifts in the transmitted fields offering a potential for manipulation of wavefields. Here, we present Finite Element Method simulations and experiments investigating light passing through arrays of nanometric spatially varying near-resonant slits perforated in a silver film. We demonstrate that a one-dimensional focusing element can be obtained by tailoring the phase across the device through varying slit sizes around the resonant dimensions for a particular design wavelength.

© 2010 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(080.3630) Geometric optics : Lenses

ToC Category:
Diffraction and Gratings

History
Original Manuscript: March 25, 2010
Revised Manuscript: May 9, 2010
Manuscript Accepted: May 10, 2010
Published: May 18, 2010

Citation
X. M. Goh, L. Lin, and A. Roberts, "Planar focusing elements using spatially varying near-resonant aperture arrays," Opt. Express 18, 11683-11688 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-11-11683


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