Ultrafast graphene-based broadband THz detector
Ultrafast graphene-based broadband THz detector
Mittendorff, M.; Winnerl, S.; Kamann, J.; Eroms, J.; Weiss, D.; Schneider, H.; Helm, M.
We present an ultrafast graphene-based detector, working in the THz range at room temperature. A logarithmic-periodic antenna is coupled to a graphene flake that is produced by exfoliation on SiO2. The detector was characterized with the free-electron laser FELBE for wavelengths from 8 µm to 220 µm. The detector rise time is 50 ps in the wavelength range from 30 µm to 220 µm. Autocorrelation measurements exploiting the nonlinear photocurrent response at high intensities reveal an intrinsic response time below 10 ps. This detector has a high potential for characterizing temporal overlaps, e. g. in two-color pump-probe experiments.
Keywords: graphene; ultrafast detector; THz detection
Involved research facilities
- Radiation Source ELBE DOI: 10.17815/jlsrf-2-58
Related publications
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 18819) publication
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Applied Physics Letters 103(2013)2, 021113
DOI: 10.1063/1.4813621
Cited 182 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-18819