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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 6 — May. 26, 2009

Efficient unidirectional ridge excitation of surface plasmons

I. P. Radko, S. I. Bozhevolnyi, G. Brucoli, L. Martín-Moreno, F. J. García-Vidal, and A. Boltasseva  »View Author Affiliations


Optics Express, Vol. 17, Issue 9, pp. 7228-7232 (2009)
http://dx.doi.org/10.1364/OE.17.007228


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Abstract

Using leakage-radiation microscopy, we characterize the efficiency of unidirectional surface-plasmon excitation with periodic (800 nm) arrays of 130-nm-high and 330-nm-wide gold ridges on a thin gold film illuminated with a focused (5-μm-wide) laser beam. We demonstrate that, at the resonant wavelength of 816 nm, the excitation efficiency of > 0.4 can be obtained with ≥ 5 ridges by adjusting the beam position. Conducting numerical simulations, we account for the experimental results and calculate the electric-field enhancement achieved near the gold surface.

© 2009 Optical Society of America

OCIS Codes
(230.1950) Optical devices : Diffraction gratings
(230.4110) Optical devices : Modulators
(240.6680) Optics at surfaces : Surface plasmons
(250.7360) Optoelectronics : Waveguide modulators
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: January 28, 2009
Revised Manuscript: March 26, 2009
Manuscript Accepted: March 27, 2009
Published: April 16, 2009

Virtual Issues
Vol. 4, Iss. 6 Virtual Journal for Biomedical Optics

Citation
I. P. Radko, S. I. Bozhevolnyi, G. Brucoli, L. Martin-Moreno, F. J. Garcia-Vidal, and A. Boltasseva, "Efficient unidirectional ridge excitation of surface plasmons," Opt. Express 17, 7228-7232 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-9-7228


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References

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