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Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers

Nature communications, 2011-11, Vol.2 (1), p.517, Article 517 [Peer Reviewed Journal]

Copyright Nature Publishing Group Nov 2011 ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/ncomms1528 ;PMID: 22044996

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  • Title:
    Broadband polarization-independent resonant light absorption using ultrathin plasmonic super absorbers
  • Author: Aydin, Koray ; Ferry, Vivian E ; Briggs, Ryan M ; Atwater, Harry A
  • Subjects: Absorption ; Arrays ; Design ; Light ; Metals ; Nanostructures - chemistry ; Nanotechnology - methods ; Photovoltaic cells ; Scanning electron microscopy ; Surface Plasmon Resonance - methods
  • Is Part Of: Nature communications, 2011-11, Vol.2 (1), p.517, Article 517
  • Description: Resonant plasmonic and metamaterial structures allow for control of fundamental optical processes such as absorption, emission and refraction at the nanoscale. Considerable recent research has focused on energy absorption processes, and plasmonic nanostructures have been shown to enhance the performance of photovoltaic and thermophotovoltaic cells. Although reducing metallic losses is a widely sought goal in nanophotonics, the design of nanostructured 'black' super absorbers from materials comprising only lossless dielectric materials and highly reflective noble metals represents a new research direction. Here we demonstrate an ultrathin (260 nm) plasmonic super absorber consisting of a metal-insulator-metal stack with a nanostructured top silver film composed of crossed trapezoidal arrays. Our super absorber yields broadband and polarization-independent resonant light absorption over the entire visible spectrum (400-700 nm) with an average measured absorption of 0.71 and simulated absorption of 0.85. Proposed nanostructured absorbers open a path to realize ultrathin black metamaterials based on resonant absorption.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2041-1723
    EISSN: 2041-1723
    DOI: 10.1038/ncomms1528
    PMID: 22044996
  • Source: MEDLINE
    ProQuest Central
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