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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 16 — Aug. 15, 2007
  • pp: 2330–2332

Distributed feedback gratings for surface-plasmon polaritons based on metal nano-groove/ridge arrays

José A. Sánchez-Gil  »View Author Affiliations


Optics Letters, Vol. 32, Issue 16, pp. 2330-2332 (2007)
http://dx.doi.org/10.1364/OL.32.002330


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Abstract

The existence of gap states within the first stop band is theoretically investigated for surface-plasmon polaritons propagating along metal surfaces structured with finite arrays of nano-grooves/ridges with imperfections. By means of rigorous calculations of all scattering channels on the basis of the reduced Rayleigh equation, it is shown that a mismatch of the grating period, rather than simple vacant/defect sites, favors the opening of gap states (located at midgap for half-period shifts) as a phase step does in distributed feedback gratings. Quality factors of the resulting surface-plasmon polaritons' resonances are limited by radiative leakage and ohmic losses.

© 2007 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(290.0290) Scattering : Scattering

ToC Category:
Physical Optics

History
Original Manuscript: April 19, 2007
Revised Manuscript: June 12, 2007
Manuscript Accepted: June 23, 2007
Published: August 2, 2007

Citation
José A. Sánchez-Gil, "Distributed feedback gratings for surface-plasmon polaritons based on metal nano-groove/ridge arrays," Opt. Lett. 32, 2330-2332 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-16-2330

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