On-Chip Picosecond Pulse Detection and Generation Using Graphene Photoconductive Switches

[Image: see text] We report on the use of graphene for room temperature on-chip detection and generation of pulsed terahertz (THz) frequency radiation, exploiting the fast carrier dynamics of light-generated hot carriers, and compare our results with conventional low-temperature-grown gallium arseni...

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Detalles Bibliográficos
Autores principales: Hunter, Nicholas, Mayorov, Alexander S., Wood, Christopher D., Russell, Christopher, Li, Lianhe, Linfield, Edmund H., Davies, A. Giles, Cunningham, John E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2015
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4370719/
https://www.ncbi.nlm.nih.gov/pubmed/25710079
http://dx.doi.org/10.1021/nl504116w
Descripción
Sumario:[Image: see text] We report on the use of graphene for room temperature on-chip detection and generation of pulsed terahertz (THz) frequency radiation, exploiting the fast carrier dynamics of light-generated hot carriers, and compare our results with conventional low-temperature-grown gallium arsenide (LT-GaAs) photoconductive (PC) switches. Coupling of picosecond-duration pulses from a biased graphene PC switch into Goubau line waveguides is also demonstrated. A Drude transport model based on the transient photoconductance of graphene is used to describe the mechanism for both detection and generation of THz radiation.

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