Ultrafast graphene-based broadband THz detector

By M. Mittendorff, S. Winnerl, J. Kamann, J. Eroms, D. Weiss, H. Schneider, M. Helm. 2013

203 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/69d1997c59f58be3afa3dc0572022f0d51397e83

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Citations in the corpus

• Sensitive room-temperature terahertz detection via the photothermoelectric effect in graphene. (2013, background): “e time measured on devices on SiO 2/Si at T= 150 K. Our results are consistent with other direct measurements of the also response time of similar graphene devices in the near infrared[11,20] and THz [18] where the characteristic time scale was also found to be tens of ps. Hence we expect similar pe”