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Y05: Polaritonic Metamaterials

Fri. March 8, 8:00 a.m. – 9:24 a.m. CST

L100E

Sponsoring Units: DMPChair: Milad Nourbakhsh, The University of Oklahoma

Fri. March 8, 8:00 a.m. – 8:12 a.m. CST

L100E

Resonant nanocavities designed for the manipulation of localized and propagating surface phonon polaritons on polar dielectrics hold great promise as an essential platform for mid-far infrared metasurfaces. Passive nanocavity arrays are constructed with deep sub-wavelength grooves of a metal-insulator-polar dielectric layered structure, which acts as a surface waveguide that supports coupled plasmon-phonon polariton hybrid modes. For active nanocavity arrays, vanadium dioxide (VO2) is a promising candidate as a spacer layer in the surface waveguide because VO2 undergoes a reversible insulator-to-metal phase transition near room temperature. Here, we employ SiO2 films as the passive and VO2 films for the active platform. These materials are applied on two polar dielectric substrates: sapphire and gallium arsenide (GaAs), which Reststrahlen band corresponding to the deep mid-infrared (10 - 20 microns) and far-infrared (28 – 33 microns) regions, respectively. we numerically and experimentally demonstrate passive and active tunable surface phonon polaritonic devices working within the Reststrahlen band. The devices consist of 40 nm thick gold and 100 nm thick spacer on sapphire and GaAs substrates. The cavity resonance shows redshifts as temperature increases for active tuning.

Presented By

  • Imtiaz Ahmad (Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA)

Authors

  • Imtiaz Ahmad (Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA)
  • Sundar Kunwar (Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA)
  • Pinku Roy (Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA)
  • Matthew Gaddy (Department of Electrical and Computer Engineering and NanoTech Center, Texas Tech University, Lubbock, TX 79409, USA)
  • Vladimir Kuryatkov (Department of Electrical and Computer Engineering and NanoTech Center, Texas Tech University, Lubbock, TX 79409, USA)
  • Ayrton A Bernussi (Department of Electrical and Computer Engineering and NanoTech Center, Texas Tech University, Lubbock, TX 79409, USA)
  • Aiping Chen (Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, NM 87545, USA)
  • Myoung-Hwan Kim (Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA)