Tailoring terahertz near-field enhancement via two-dimensional plasmons.
Phys Rev Lett
; 108(12): 127401, 2012 Mar 23.
Article
en En
| MEDLINE
| ID: mdl-22540623
ABSTRACT
We suggest a novel possibility for electrically tunable terahertz near-field enhancement in flatland electronic materials supporting two-dimensional plasmons, including recently discovered graphene. We employ electric-field effect modulation of electron density in such materials and induce a periodic plasmonic lattice with a defect cavity. We demonstrate that the plasmons resonantly excited in such a periodic plasmonic lattice by an incident terahertz radiation can strongly pump the cavity plasmon modes leading to a deep subwavelength concentration of terahertz energy, beyond λ/1000, with giant electric-field enhancement factors up to 10(4), which is 2 orders of magnitude higher than achieved previously in metal-based terahertz field concentrators.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Radiación Terahertz
/
Modelos Teóricos
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Phys Rev Lett
Año:
2012
Tipo del documento:
Article
País de afiliación:
Rusia