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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 20 — Oct. 15, 2008
  • pp: 2398–2400

Total light absorption in a wide range of incidence by nanostructured metals without plasmons

Nicolas Bonod and Evgeny Popov  »View Author Affiliations


Optics Letters, Vol. 33, Issue 20, pp. 2398-2400 (2008)
http://dx.doi.org/10.1364/OL.33.002398


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Abstract

Metals structured by nanocavities have recently been demonstrated to efficiently absorb light in a wide range of angles of incidence. It has been assumed that nanovoid plasmons are at the origin of the strong absorption. It is shown that it is possible to totally absorb incident light without plasmons. To avoid their excitation, a diffraction grating consisting of cylindrical cavities in a metallic substrate is illuminated in transverse electric polarization. It is found that cylindrical cavities can sustain cavity resonances with a high enhancement of the light intensity, provoking a total absorption of light in a wide range of incidence.

© 2008 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(050.5745) Diffraction and gratings : Resonance domain

ToC Category:
Diffraction and Gratings

History
Original Manuscript: July 31, 2008
Manuscript Accepted: August 26, 2008
Published: October 14, 2008

Citation
Nicolas Bonod and Evgeny Popov, "Total light absorption in a wide range of incidence by nanostructured metals without plasmons," Opt. Lett. 33, 2398-2400 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-20-2398

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