On-chip picosecond pulse detection and generation using graphene photoconductive switches.
On-chip picosecond pulse detection and generation using graphene photoconductive switches.
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DOI:
10.1021/nl504116w
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发表时间:
2015-03-11
期刊:
影响因子:
10.8
通讯作者:
Cunningham JE
中科院分区:
文献类型:
--
作者:
Hunter N;Mayorov AS;Wood CD;Russell C;Li L;Linfield EH;Davies AG;Cunningham JE
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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