Fabrication of Broad Band Mid-Infrared Absorber based on Periodic Dielectric-Thin Metal Film Multilayer Structures

ORAL

Abstract

We present results from measurements on periodic multilayer structure of alternating dielectric and thin metal layers to achieve a broadband absorber of mid-infrared radiation. We examine the effect on performance of a back-reflective metallic bottom layer, surface roughness at interfaces, the metal conductance, the thickness of dielectric layers, and a patterned anti-reflective layer. We determine optimum structure parameters for absorption of a 500 K-black body spectrum, and find that the numerical results agree well with the measured absorption spectra. We also investigate the possibility of fabricating a patterned anti-reflective layer to further increase the absorption.

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Authors

  • Shy-Hauh Guo

    • Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742
    • Department of Materials Science and Engineering, University of Maryland, MD, 20742

  • Andrei Sushkov

    • Department of Physics, University of Maryland, College Park, MD 20742
    • MRSEC and CNAM, Department of Physics, University of Maryland
    • Department of Physics, University of Maryland, College Park, MD 20742, USA
    • Center for Nanophysics and Advanced Materials, University of Maryland, College Park

  • Timothy Corrigan

    • Department of Physical Sciences, Concord University, Athens, WV 24712

  • Dong Park

    • Department of Electrical Computer Engineering, University of Maryland, College Park, MD 20742

  • Dennis Drew

    • Department of Physics, University of Maryland, College Park, MD 20742
    • Department of Physics, University of Maryland, College Park, MD 20742, USA
    • Physics department, University of Maryland

  • Paul Kolb

    • Laboratory for Physical Sciences, College Park, MD 20740

  • Warren Herman

    • Laboratory for Physical Sciences, College Park, MD 20740

  • Ray Phaneuf

    • Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742
    • Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742
    • University of Maryland