Tunable broadband plasmonic perfect absorber at visible frequency

Mehdi Keshavarz Hedayati, Franz Faupel, Mady Elbahri

Research output: Contribution to journalJournal articleResearchpeer-review


Metamaterials and plasmonics as a new pioneering field in photonics joins the features of photonics and electronics by coupling photons to conduction electrons of a metal as surface plasmons (SP). This concept has been implemented for a variety of applications including negative index of refraction, magnetism at visible frequency, cloaking devices amongst others. In the present work, we used plasmonic hybrid material in order to design and fabricate a broad-band perfect plasmonic metamaterial absorber in a stack of metal and Copper-PTFE (Polytetrafluoroethylene) nanocomposite showing an average absorbance of 97.5 % in the whole visible spectrum. Our experimental results showed that the absorption peak of the stacks can be tuned upon varying the thickness and type of the spacer layer due to the sensitivity of plasmon resonance to its environment. To the best of our knowledge, this is the first report of a plasmonic metamaterial absorber based on copper with absorption around 100 % in the entire visible and near-Infrared (NIR).
Original languageEnglish
JournalApplied Physics A: Materials Science & Processing
Issue number4
Pages (from-to)769-773
Publication statusPublished - 2012
Externally publishedYes


  • Physics
  • Surfaces and Interfaces, Thin Films
  • Condensed Matter Physics
  • Optical and Electronic Materials
  • Operating Procedures, Materials Treatment
  • Characterization and Evaluation of Materials
  • Nanotechnology
  • SC12
  • Materials Science (all)
  • Chemistry (all)
  • Absorbances
  • Absorption peaks
  • Broad bands
  • Conduction electrons
  • Negative index of refraction
  • Perfect absorber
  • Plasmon resonances
  • Plasmonic
  • Plasmonic metamaterials
  • Plasmonics
  • Spacer layer
  • Surface plasmons
  • Visible and near infrared
  • Visible frequencies
  • Visible spectra
  • Copper
  • Hybrid materials
  • Infrared devices
  • Metamaterials
  • Refractive index
  • Plasmons
  • BROADBAND communication systems


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