Infrared nanoscopy of dirac plasmons at the graphene-SiO2 interface.
Nano Lett
; 11(11): 4701-5, 2011 Nov 09.
Article
em En
| MEDLINE
| ID: mdl-21972938
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 2 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 SiO(2) substrate. Our data augmented by detailed modeling establish graphene as a new medium supporting plasmonic effects that can be controlled by gate voltage.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dióxido de Silício
/
Ressonância de Plasmônio de Superfície
/
Nanoestruturas
/
Grafite
/
Modelos Químicos
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Estados Unidos