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Optical absorbers based on strong interference in ultra‐thin films

Open access
Kats, Mikhail A., Capasso, Federico·2016·Laser & Photonics Reviews

Abstract

Optical absorbers find uses in a wide array of applications across the electromagnetic spectrum, including photovoltaic and photochemical cells, photodetectors, optical filters, stealth technology, and thermal light sources. Recent efforts have sought to reduce the footprint of optical absorbers, conventionally based on graded structures or Fabry‐Perot‐type cavities, by using emerging concepts in plasmonics, metamaterials, and metasurfaces. Unfortunately, these new absorber designs require patterning on subwavelength length scales, and are therefore impractical for many large‐scale optical and optoelectronic devices. In this article, we summarize recent progress in the development of optical absorbers based on lossy films with thicknesses significantly smaller than the incident optical wavelength. These structures have a small footprint and require no nanoscale patterning. We outline the theoretical foundation of these absorbers based on “ultra‐thin‐film interference”, including the concepts of loss‐induced phase shifts and critical coupling, and then review several applications, including ultra‐thin color coatings, decorative photovoltaics, high‐efficiency photochemical cells, and infrared scene generators. image

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Metadata

Authors
Kats, M. A., & Capasso, F.
Venue
Laser & Photonics Reviews
Publisher
Wiley
Published
2016-09
Volume
10
Issue
5
Pages
735-749
ISSN
  • 1863-8880 (ISSN-L)
  • 1863-8899
OpenAlex
W2473599733
Cited by
294
References
50
FWCI
8.15
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Optical absorbers based on strong interference in ultra‐thin films. https://app.cochat.ai/papers/10.1002/lpor.201600098
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Kats, M. A., & Capasso, F. (2016). Optical absorbers based on strong interference in ultra‐thin films. Laser & Photonics Reviews. https://doi.org/10.1002/lpor.201600098

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