Giant terahertz near-field enhancement by two-dimensional plasmons
arXiv:1109.3943 · doi:10.1103/PhysRevLett.108.127401
Abstract
We consider a periodically gated two-dimensional electron system, with a central gate finger biased independently creating a tunable plasmonic cavity in a planar plasmonic crystal. We demonstrate that the plasmons resonantly excited in the periodic plasmonic lattice by incident terahertz radiation can strongly pump the cavity plasmon modes leading to a deep sub-wavelength concentration of terahertz energy with giant electric field enhancement factor up to 10000.
4 pages, 4 figure
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- Inducing an Incipient Terahertz Finite Plasmonic Crystal in Coupled Two Dimensional Plasmonic Cavities
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- Interaction of gated and ungated plasmons in two-dimensional electron systems
- Light scattering by a medium with a spatially modulated optical conductivity: the case of graphene
- Interferometric Measurement of Far Infrared Plasmons via Resonant Homodyne Mixing
- Coherent phenomena in terahertz 2D plasmonic structures: strong coupling, plasmonic crystals, and induced transparency by coupling of localized modes
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