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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 24 — Dec. 15, 2012
  • pp: 5076–5078

Control of optical orbital angular momentum by Vogel spiral arrays of metallic nanoparticles

Nate Lawrence, Jacob Trevino, and Luca Dal Negro  »View Author Affiliations


Optics Letters, Vol. 37, Issue 24, pp. 5076-5078 (2012)
http://dx.doi.org/10.1364/OL.37.005076


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Abstract

In this Letter, we experimentally demonstrate structured light carrying multiple values of orbital angular momentum (OAM) in the farfield scattering region of Vogel spiral arrays of metallic nanoparticles. Using Fourier–Hankel mode decomposition analysis and interferometric reconstruction of the complex amplitude of scattered waves, we show the ability to encode well-defined numerical sequences, determined by the aperiodic spiral geometry, into azimuthal OAM values, in excellent agreement with analytical scattering theory. The generation of azimuthal sequences of OAM values by light scattering from engineered aperiodic surfaces is relevant to a number of device applications for secure optical communication, classical cryptography, and quantum cryptography.

© 2012 Optical Society of America

OCIS Codes
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: July 10, 2012
Revised Manuscript: October 3, 2012
Manuscript Accepted: October 18, 2012
Published: December 6, 2012

Citation
Nate Lawrence, Jacob Trevino, and Luca Dal Negro, "Control of optical orbital angular momentum by Vogel spiral arrays of metallic nanoparticles," Opt. Lett. 37, 5076-5078 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-24-5076

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