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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 25307–25315

Triple-layer Fabry-Perot absorber with near-perfect absorption in visible and near-infrared regime

Shiwei Shu, Zhe Li, and Yang Yang Li  »View Author Affiliations

Optics Express, Vol. 21, Issue 21, pp. 25307-25315 (2013)

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A simple absorber design which enables near-perfect absorption in the visible and near-infrared regions is presented. The absorber is an unpatterned metal/dielectric/metal triple-layer, e.g., a 20 nm-thick metal film as the top layer, a 250 nm-thick dielectric film as the middle layer, and a 200 nm-thick metal film as the bottom layer. It was found that the high-efficiency absorption at specific wavelengths is mainly due to the Fabry-Perot (FP) resonances in the dielectric middle layer which result in trapping of the resonant light in the middle layer and thus enhanced absorption efficiency.

© 2013 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(240.0310) Optics at surfaces : Thin films
(310.1620) Thin films : Interference coatings

ToC Category:
Thin Films

Original Manuscript: July 9, 2013
Revised Manuscript: September 26, 2013
Manuscript Accepted: September 27, 2013
Published: October 16, 2013

Shiwei Shu, Zhe Li, and Yang Yang Li, "Triple-layer Fabry-Perot absorber with near-perfect absorption in visible and near-infrared regime," Opt. Express 21, 25307-25315 (2013)

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