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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 17 — Sep. 1, 2012
  • pp: 3495–3497

Metallic rugate structures for near-perfect absorbers in visible and near-infrared regions

Shiwei Shu and Yang Yang Li  »View Author Affiliations


Optics Letters, Vol. 37, Issue 17, pp. 3495-3497 (2012)
http://dx.doi.org/10.1364/OL.37.003495


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Abstract

Metallic rugate structures are theoretically investigated for achieving near-perfect absorption in the visible and near-infrared regions. Our model builds on nanoporous metal films whose porosity (volume fraction of voids) follows a sinewave along the film thickness. By setting the initial phase of porosity at the top surface as 0, near-perfect absorption is obtained. The impacts of various structural parameters on the characteristic absorption behaviors are studied. Furthermore, multiple peaks or bands with high absorption can be achieved by integrating several periodicities in one structure. The rugate absorbers show near-perfect absorption for TE and TM polarizations and large incident angles.

© 2012 Optical Society of America

OCIS Codes
(240.0310) Optics at surfaces : Thin films
(310.1620) Thin films : Interference coatings

ToC Category:
Optics at Surfaces

History
Original Manuscript: May 4, 2012
Revised Manuscript: June 20, 2012
Manuscript Accepted: July 6, 2012
Published: August 16, 2012

Citation
Shiwei Shu and Yang Yang Li, "Metallic rugate structures for near-perfect absorbers in visible and near-infrared regions," Opt. Lett. 37, 3495-3497 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-17-3495

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