Mid-infrared thermal emission from coupled surface plasmon-phonon polariton resonances

POSTER

Abstract

Strong coupling of infrared light and surface polarized ions provides a unique channel between photon and phonon via electric charge oscillations, which enables bidirectional energy flow between optical and thermal energy. Therefore, optical metasurfaces based on phonon polaritons are promising candidate as thermal metasurfaces according to Kirchhoff’s law of thermal radiation stating that the absorptivity of a resonator is equal to the emissivity. For a synchronized emission, resonators have crosstalk each other. We observe a well-defined and narrow-band thermal emission from coupled surface plasmon-phonon polariton resonance induced by deeply subwavelength-scale resonant nanocavity arrays. Metal (gold)-insulator (silicon) layered nanocavity on polar dielectric crystal (silicon carbide) confines a guided mode of coupled surface plasmon-phonon polaritons with half-wave Fabry-Perot resonance condition. Each cavity has a crosstalk with near neighbor cavities. We develop a mid-infrared grating spectrometer integrated into infrared microscope with Fourier transform infrared spectrometer. The filtered thermal emission by two spectrometers is observed while heating the sample up to 400 K. Our thermal emitter platform will benefit to design thermal metasurfaces.

Presenters

  • Imtiaz Ahmad

    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA
    • Department of Physics and Astronomy, Texas Tech University

Authors

  • Imtiaz Ahmad

    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA
    • Department of Physics and Astronomy, Texas Tech University

  • SATYANARAYANA R KACHIRAJU

    • Department of Physics and Astronomy, The University of Texas Rio Grande Valley, Department of Physics and Astronomy, Texas Tech University
    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA Department of Physics and Astronomy, The University of Texas Rio Grande Valley, Brownsville
    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA., Department of Physics and Astronomy, The University of Texas Rio Grande Valley, Edinburg
    • University of Texas Rio Grande Valley

  • Michael Totedo

    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA.

  • Ivan Nekrashevich

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA Department of Integrated Bio & Nano Systems, University of Houston, Houston, TX 77204, USA
    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Superconducting Quantum Materials and Systems Center (SQMS), Fermilab
    • Los Alamos Natl Lab

  • Long Chang

    • Department of Integrated Bio & Nano Systems, University of Houston
    • Department of Integrated Bio & Nano Systems, University of Houston, Houston, TX 77204, USA
    • Department of Integrated Bio & Nano Systems, Univ. of Houston, Houston, TX 77204, USA

  • Myoung-Hwan Kim

    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409 USA
    • Department of Physics and Astronomy, Texas Tech University
    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA.
    • Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA