Air-Spaced Triple Band Metamaterial Perfect Absorber

ORAL

Abstract

We present a polarization insensitive air spaced triple band metamaterial perfect absorber (MMPA) consisting of a metamaterial layer and metallic ground plane. For our MMPA, the three near unity-absorption peaks can be individually specified by selecting the size of the ring resonators within one metamaterial unit cell – that is, inter-unit cell coupling is negligible. For our MMPA design, the coupling between the metamaterial layer and the ground plane is very strong. As a result, near-field interactions must be taken into account to properly analyze the electromagnetic response (EMR). Interference theory is often used to model the EMR of MMPAs. To account for near-field coupling we incorporate a correction term into our interference model. Our approach is in agreement with full-wave numerical simulations and experimental measurements. These findings demonstrate that a capacitance increase and an inductance decrease due to the coupling between the metamaterial layer and the ground plane are the primary causes for the difference between the standard interference theory and the experimental results.

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Presenters

  • CHUNXU CHEN

    Boston University, department of mechanical engineering, boston university

Authors

  • CHUNXU CHEN

    Boston University, department of mechanical engineering, boston university

  • Xiaoguang Zhao

    Boston University, department of mechanical engineering, boston university

  • Jacob Schalch

    UC San Diego, University of California, San Diego, Department of Physics, University of California San Diego

  • Sultan Can

    Boston University

  • Guangwu Duan

    Boston University

  • Richard Douglas Averitt

    UC San Diego, University of California, San Diego, Department of Physics, University of California San Diego, Univ of California - San Diego

  • Xin Zhang

    Boston University, department of mechanical engineering, boston university