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On-chip picosecond pulse detection and generation using graphene photoconductive switches.

ABSTRACT: 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.

SUBMITTER: Hunter N

PROVIDER: S-EPMC4370719 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature

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On-chip picosecond pulse detection and generation using graphene photoconductive switches.

Hunter Nicholas N Mayorov Alexander S AS Wood Christopher D CD Russell Christopher C Li Lianhe L Linfield Edmund H EH Davies A Giles AG Cunningham John E JE

Nano letters 20150302 3

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 photo ...[more]

PMID: 25710079

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Dataset Information

On-chip picosecond pulse detection and generation using graphene photoconductive switches.

Publications

On-chip picosecond pulse detection and generation using graphene photoconductive switches.

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