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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 2748–2756

Tunable directive radiation of surface-plasmon diffraction gratings

Youngkyu Lee, Kazunori Hoshino, Andrea Alù, and Xiaojing Zhang  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 2748-2756 (2013)

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We experimentally demonstrate tunable radiation from a periodic array of plasmonic nanoscatterers, tailored to convert surface plasmon polaritons into directive leaky modes. Extending our previous studies on efficient directional beaming based on leaky-wave radiation from periodic gratings driven by a subwavelength slit, we experimentally show dynamic beam sweeping by tuning the directional leaky-wave mechanism in real-time. Two alternative tuning mechanisms, wavelength- and index-mediated beam sweeping, are employed to modify the relative phase of scattered light at each grating edge and provide the required modification of the radiation angle.

© 2013 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: October 9, 2012
Revised Manuscript: November 16, 2012
Manuscript Accepted: November 19, 2012
Published: January 29, 2013

Youngkyu Lee, Kazunori Hoshino, Andrea Alù, and Xiaojing Zhang, "Tunable directive radiation of surface-plasmon diffraction gratings," Opt. Express 21, 2748-2756 (2013)

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