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Infrared Nanoscopy of Dirac Plasmons at the Graphene–SiO2 Interface
- Source :
- Nano Letters. 11:4701-4705
- Publication Year :
- 2011
- Publisher :
- American Chemical Society (ACS), 2011.
-
Abstract
- We report on infrared (IR) nanoscopy of 2D plasmon excitations of Dirac fermions in graphene. This is achieved by confining mid-IR radiation at the apex of a nanoscale tip: an approach yielding two orders of magnitude increase in the value of in-plane component of incident wavevector q compared to free space propagation. At these high wavevectors, the Dirac plasmon is found to dramatically enhance the near-field interaction with mid-IR surface phonons of SiO2 substrate. Our data augmented by detailed modeling establish graphene as a new medium supporting plasmonic effects that can be controlled by gate voltage.<br />Comment: 12 pages, 4 figures
- Subjects :
- Phonon
Infrared
Dirac (software)
FOS: Physical sciences
Physics::Optics
Bioengineering
law.invention
symbols.namesake
law
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
General Materials Science
Wave vector
Astrophysics::Galaxy Astrophysics
Plasmon
Physics
Condensed Matter - Mesoscale and Nanoscale Physics
Condensed matter physics
Graphene
Mechanical Engineering
General Chemistry
Condensed Matter Physics
Dirac fermion
symbols
Order of magnitude
Physics - Optics
Optics (physics.optics)
Subjects
Details
- ISSN :
- 15306992 and 15306984
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Nano Letters
- Accession number :
- edsair.doi.dedup.....7e518e9ef4cf63c16448f6833d16c385