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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 1531–1540

Coupling of localized surface plasmons to U-shaped cavities for high-sensitivity and miniaturized detectors

Ya-Lun Ho, Yaerim Lee, Etsuo Maeda, and Jean-Jacques Delaunay  »View Author Affiliations

Optics Express, Vol. 21, Issue 2, pp. 1531-1540 (2013)

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We report numerical analysis of the coupling of localized surface plasmons to the modes of U-shaped cavities. The coupling results in intense resonance for which the electric field is strongly enhanced on the cavity surfaces. As a result, an optical vortex in the power flow is formed in the cavities and a sharp and strong resonance dip is observed in the reflectance spectrum. High sensitivity of the dip wavelength to change in the refractive index of the surrounding medium is reported. The high sensitivity is realized with a small number of cavities, thus enabling miniaturization of detectors based on U-shaped cavities.

© 2013 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(140.3945) Lasers and laser optics : Microcavities
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Optics at Surfaces

Original Manuscript: November 30, 2012
Revised Manuscript: December 28, 2012
Manuscript Accepted: January 3, 2013
Published: January 14, 2013

Virtual Issues
Vol. 8, Iss. 2 Virtual Journal for Biomedical Optics

Ya-Lun Ho, Yaerim Lee, Etsuo Maeda, and Jean-Jacques Delaunay, "Coupling of localized surface plasmons to U-shaped cavities for high-sensitivity and miniaturized detectors," Opt. Express 21, 1531-1540 (2013)

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