期刊
NANO LETTERS
卷 14, 期 7, 页码 3733-3742出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl5004762
关键词
Graphene; photodetectors; Raman spectroscopy; photoresponse; optoelectronics
类别
资金
- EU Graphene Flagship [604391]
- ERC grants NANOPOTS
- Hetero2D
- Royal Society Wolfson Research Merit Award
- EU projects GENIUS
- CARERAMM
- EPSRC [EP/K01711X/1, EP/K017144/1, EP/L016087/1]
- Nokia Research Centre Cambridge
- Deutsche Forschungsgemeinschaft (DFG) [GRK 1570]
- [SPP 1285]
- EPSRC [EP/K01711X/1, EP/K017144/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K01711X/1, EP/K017144/1] Funding Source: researchfish
Graphene's high mobility and Fermi velocity, combined with its constant light absorption in the visible to far-infrared range, make it an ideal material to fabricate high-speed and ultrabroadband photodetectors. However, the precise mechanism of photodetection is still debated. Here, we report wavelength and polarization-dependent measurements of metal-graphene-metal photodetectors. This allows us to quantify and control the relative contributions of both photothermo- and photoelectric effects, both adding to the overall photoresponse. This paves the way for a more efficient photodetector design for ultrafast operating speeds.
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