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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 13311–13319

Efficient absorption of visible radiation by gap plasmon resonators

Michael G. Nielsen, Anders Pors, Ole Albrektsen, and Sergey I. Bozhevolnyi  »View Author Affiliations

Optics Express, Vol. 20, Issue 12, pp. 13311-13319 (2012)

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We demonstrate experimentally a periodic array of differently-sized and circularly-shaped gap plasmon resonators (GPRs) with the average absorption ~94% for unpolarized light in the entire visible wavelength range (400-750nm). Finite-element simulations verify that the polarization insensitive broadband absorption originates from localized gap surface plasmons whose resonant excitations only weakly depend on the angle of incidence. Arrays of GPRs also exhibit enhanced local field intensities (~115) as revealed by scanning two-photon photoluminescence microscopy, that are spectrally correlated with the minima in corresponding linear reflection spectra.

© 2012 OSA

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures
(010.1030) Atmospheric and oceanic optics : Absorption

ToC Category:
Optics at Surfaces

Original Manuscript: April 18, 2012
Revised Manuscript: May 22, 2012
Manuscript Accepted: May 22, 2012
Published: May 29, 2012

Michael G. Nielsen, Anders Pors, Ole Albrektsen, and Sergey I. Bozhevolnyi, "Efficient absorption of visible radiation by gap plasmon resonators," Opt. Express 20, 13311-13319 (2012)

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