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