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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 22 — Nov. 15, 2009
  • pp: 3532–3534

Antireflection gratings for a photonic-crystal flat lens

Wojciech Śmigaj, Boris Gralak, Raphaël Pierre, and Gérard Tayeb  »View Author Affiliations

Optics Letters, Vol. 34, Issue 22, pp. 3532-3534 (2009)

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A dielectric structure with effective permittivity and permeability close to 1 operating for propagative waves at optical wavelengths is proposed. This structure is a two-dimensional photonic crystal with refractive index 1 , coated by appropriate antireflection gratings. Numerical simulations involving a flat lens made of this optimized crystal illustrate the improvements that antireflection gratings can bring. In particular, following Veselago’s proposition, this lens “can focus at a point the radiation from a point source” with negligible reflection losses. The proposed design takes into account the fabrication requirements and can be used for optical devices integrated in planar waveguides.

© 2009 Optical Society of America

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(260.2110) Physical optics : Electromagnetic optics
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Diffraction and Gratings

Original Manuscript: September 3, 2009
Revised Manuscript: October 12, 2009
Manuscript Accepted: October 12, 2009
Published: November 11, 2009

Wojciech Śmigaj, Boris Gralak, Raphaël Pierre, and Gérard Tayeb, "Antireflection gratings for a photonic-crystal flat lens," Opt. Lett. 34, 3532-3534 (2009)

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