Design and analysis of perfect terahertz metamaterial absorber by a novel dynamic circuit model.
Opt Express
; 21(14): 16455-65, 2013 Jul 15.
Article
en En
| MEDLINE
| ID: mdl-23938496
ABSTRACT
Metamaterial terahertz absorbers composed of a frequency selective layer followed by a spacer and a metallic backplane have recently attracted great attention as a device to detect terahertz radiation. In this work, we present a quasistatic dynamic circuit model that can decently describe operational principle of metamaterial terahertz absorbers based on interference theory of reflected waves. The model comprises two series LC resonance components, one for resonance in frequency selective surface (FSS) and another for resonance inside the spacer. Absorption frequency is dominantly determined by the LC of FSS while the spacer LC changes slightly the magnitude and frequency of absorption. This model fits perfectly for both simulated and experimental data. By using this model, we study our designed absorber and we analyze the effect of changing in spacer thickness and metal conductivity on absorption spectrum.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Refractometría
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Diseño Asistido por Computadora
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Resonancia por Plasmón de Superficie
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Electrónica
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Materiales Manufacturados
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Modelos Teóricos
Idioma:
En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos