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, Martin J Cryan, Martin Lopez Garcia

Research output: Contribution to journalArticle (Academic Journal)

1 Citation (Scopus)

Abstract

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 (lambda = 1.55 mu m) 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. (C) 2014 Optical Society of America

Original languageEnglish
Pages (from-to)3786-3789
Number of pages4
JournalOptics Letters
Volume39
Issue number13
DOIs
Publication statusPublished - 1 Jul 2014

Keywords

  • LASERS
  • LIGHT

Projects

Integrated Tunable Flat Lenses (TuneFuL)

Cryan, M. J.

17/05/1217/05/15

Project: Research

Cite this

Pugh, J. R., Stokes, J. L., Lopez-Garcia, M., Gan, C-H., Nash, G. R., Rarity, J. G., Cryan, M. J., & Lopez Garcia, M. (2014). Slot-grating flat lens for telecom wavelengths. Optics Letters, 39(13), 3786-3789. https://doi.org/10.1364/OL.39.003786