Subluminal and superluminal terahertz radiation in metamaterials with electromagnetically induced transparency.
Opt Express
; 21(15): 17736-44, 2013 Jul 29.
Article
em En
| MEDLINE
| ID: mdl-23938646
ABSTRACT
We propose a scheme to design a new type of optical metamaterial that can mimic the functionality of four-state atomic systems of N-type energy-level configuration with electromagnetically induced transparency (EIT). We show that in such metamaterial a transition from a single EIT to a double EIT of terahertz radiation may be easily achieved by actively tuning the intensity of the infrared pump field or passively tuning the geometrical parameters of resonator structures. In addition, the group velocity of the terahertz radiation can be varied from subluminal to superluminal by changing the pump field intensity. The scheme suggested here may be used to construct chip-scale slow and fast light devices and to realize rapidly responded switching of terahertz radiation at room temperature.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Refratometria
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Ressonância de Plasmônio de Superfície
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Campos Eletromagnéticos
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Radiação Terahertz
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Manufaturas
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Modelos Teóricos
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
China