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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 8 — Aug. 1, 2008
  • pp: 1356–1361

Dual-wavelength light beaming from a metal nanoslit flanked by dielectric gratings

Jian Zhang and Guo Ping Wang  »View Author Affiliations


JOSA B, Vol. 25, Issue 8, pp. 1356-1361 (2008)
http://dx.doi.org/10.1364/JOSAB.25.001356


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Abstract

We design a metal-dielectric structure to realize directional beaming of dual-wavelength light based on the guided-mode resonance theory. A single nanoslit preformatted in an optically thick metal film flanked by a dielectric grating on the exit surface of the slit can realize directional beaming of two wavelength lights (442 and 633 nm ), simultaneously. Numerical simulations by using the finite-difference time-domain method demonstrate the theoretical prediction. Further investigations reveal that the structures can achieve dual-wavelength light beaming in a wide frequency window, implying the potential of the structures in near-field optics and spectroscopy, data storage, biosensors, and nanoscale directional light sources and emitters.

© 2008 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.0240) Optics at surfaces : Optics at surfaces
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: May 15, 2008
Manuscript Accepted: June 10, 2008
Published: July 29, 2008

Virtual Issues
Vol. 3, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Jian Zhang and Guo Ping Wang, "Dual-wavelength light beaming from a metal nanoslit flanked by dielectric gratings," J. Opt. Soc. Am. B 25, 1356-1361 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-8-1356

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