Active resonant nanocavity based on coupled plasmon-phonon polariton surface waveguide.

ORAL

Abstract

Vanadium dioxide (VO2) emerges as a promising candidate for the spacer layer within the mid-infrared (MIR) surface waveguide, facilitating the development of active and reconfigurable nanocavities. By modeling an active resonant nanocavity array, we investigate the Fabry-Pérot resonance condition based on the MIR surface waveguide dispersion relation of coupled surface plasmon-phonon polaritons. Here, we choose a gold-VO2-silicon carbide slab waveguide with the nanocavity structured via gold patterning atop the waveguide. The complex refractive index of VO2 undergoes a significant change across the insulator-to-metal phase transition. Analytical solutions and full-wave simulations are compared with experimental data of reflectance measurements using a high-precision heating stage integrated with a Fourier Transform Infrared spectrometer within an infrared microscope. We studied two devices with different gold cavity widths (900 nm and 1000 nm with 100 nm gap) patterned on 100 nm thick VO2 film on silicon carbide. The observed shift of the surface wave dispersion to longer wavelengths with increasing temperature corresponds to the resonance shift, indicating the high sensitivity of the resonance to the dielectric refractive index of VO2.

* *The work at Los Alamos National Laboratory was supported by the NNSA’s Laboratory Directed Research and Development Program, and was performed, in part, at the CINT, an Office of Science User Facility operated for the U.S. Department of Energy Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy’s NNSA, under contract 89233218CNA000001. *This work was supported by the Office of Naval Research Summer Faculty Program.

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Presenters

  • SATYANARAYANA R KACHIRAJU

    University of Texas Rio Grande Valley

Authors

  • SATYANARAYANA R KACHIRAJU

    University of Texas Rio Grande Valley

  • Sundar Kunwar

    Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA, lanl

  • Long Chang

    University of Houston

  • Pinku Roy

    Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Los Alamos National Laboratory, lanl

  • Vladimir Kuryatkov

    Department of Electrical and Computer Engineering and NanoTech Center, Texas Tech University, Lubbock, TX 79409, USA, Texas Tech University

  • Imtiaz Ahmad

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

  • Zachary M Brown

    Texas Tech University

  • Yejin Kwon

    Texas Tech University

  • Ayrton A Bernussi

    Department of Electrical and Computer Engineering and NanoTech Center, Texas Tech University, Lubbock, TX 79409, USA, Texas Tech University

  • Chase T Ellis

    Naval research lab, The Naval Research Laboratory, US Naval Research Laboratory, U.S. Naval Research Laboratory, Washington, D.C. 20375, USA, nrl

  • Aiping Chen

    Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Los Alamos National Laboratory, lanl

  • Myoung-Hwan Kim

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