Plasmonic Metamaterials

 

Mission
  • Understand the basic properties of surface plasmon polaritons (SPP) in conventional metals, their alloys, and exotic metals, from THz to the UV spectral range.
  • Apply this knowledge to develop new devices and spectroscopic capabilities.

 

Why Plasmonic Metamaterials?
  • THz Plasmonic Metamaterials
    • Conventional dielectric materials are lossy in the far-infrared
    • In contrast, conventional and exotic metals exhibit low loss
    • Almost no device technologies currently exist in the THz range
  • Magneto-Plasmonics for Organic Spintronics
    • Spin polarization in organic spintronic devices diminishes with temperature due to smaller surface spin polarization
    • Use of magneto-plasmons may increase the spin polarization at the FM surface and reduce its temperature dependence
  • UV Plasmonics
    • UV excitation allows access to resonant electronic states of photochemical precursors and biological molecules
    • Use Al and new alloys for high field enhancement in the UV
    • Localized immobilization and direct detection of biomolecules

 

Questions

The goal of IRG-1 is to provide insight to the following questions:

  • What are the dielectric/magnetic/electronic property limitations for supporting SPPs?
  • Can we synthesize appropriate materials to obtain the desired plasmonic response?
  • What are the SPP properties of superconductors above and below the phase transition temperatures?
  • To what extent do magneto-plasmons influence the spin polarization at the ferromagnetic/organic interface?
  • To what extent can photochemical reactions be locally enhanced and spatially controlled?
  • Can hot spots be used to interrogate chemical structure and reactions on the molecular scale?

 

Teams