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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 13 — Jul. 1, 2014
  • pp: 3786–3789

Slot-grating flat lens for telecom wavelengths

Jonathan R. Pugh, Jamie L. Stokes, Martin Lopez-Garcia, Choon-How Gan, Geoff R. Nash, John G. Rarity, and Martin J. Cryan  »View Author Affiliations

Optics Letters, Vol. 39, Issue 13, pp. 3786-3789 (2014)

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We present a stand-alone beam-focusing flat lens for use in the telecommunications wavelength range. Light incident on the back surface of the lens propagates through a subwavelength aperture and is heavily diffracted on exit and partially couples into a surface plasmon polariton and a surface wave propagating along the surface of the lens. Interference between the diffracted wave and re-emission from a grating patterned on the surface produces a highly collimated beam. We show for the first time a geometry at which a lens of this type can be used at telecommunication wavelengths (λ=1.55μm) and identify the light coupling and re-emission mechanisms involved. Measured beam profile results at varying incident wavelengths show excellent agreement with Lumerical FDTD simulation results.

© 2014 Optical Society of America

OCIS Codes
(130.3060) Integrated optics : Infrared
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(350.2770) Other areas of optics : Gratings
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

Original Manuscript: April 25, 2014
Revised Manuscript: May 22, 2014
Manuscript Accepted: May 22, 2014
Published: June 19, 2014

Jonathan R. Pugh, Jamie L. Stokes, Martin Lopez-Garcia, Choon-How Gan, Geoff R. Nash, John G. Rarity, and Martin J. Cryan, "Slot-grating flat lens for telecom wavelengths," Opt. Lett. 39, 3786-3789 (2014)

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