Fathi Gouider1, Majdi Salman1,2, Markus Göthlich1, Hennrik Schmidt2,3, Franz-J Ahlers4, Rolf Haug3 and Georg Nachtwei1
f.gouider@tu-bs.de
1 Institut für Angewandte Physik, Technische Universität Braunschweig, D-38106, Germany
2 NTH Nano School for Contacts in Nanosystems, Germany
3 Institut für Festkörperphysik, Universität Hannover, Hannover, D-30167, Germany
4 Physikalisch-Technische Bundesanstalt, Braunschweig, D-38116, German
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1 Institut für Angewandte Physik, Technische Universität Braunschweig, D-38106, Germany
2 NTH Nano School for Contacts in Nanosystems, Germany
3 Institut für Festkörperphysik, Universität Hannover, Hannover, D-30167, Germany
4 Physikalisch-Technische Bundesanstalt, Braunschweig, D-38116, German
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In this study we present magnetotransport an magnetooptical data obtained in the magnetic field range 0T < B < 7T at detectors patterned in Corbino geometry on epitaxial graphene wafer using a Ge detector. We observed the cyclotron resonance of charge carriers in these wafers by measurement of the transmission of THz wafes through the unpatterned squares (about 4 × 4mm2) of the wafers as a function of the magnetic field B applied perpendicular to the wafer. Further, we performed measurements of the photocunductivity of graphene-based devices shaped in Corbino geometry, induced by terahertz (THz) radiation generated by a p-Ge laser (emitting in the energy range 7.5meV ≤ Eph ≤ 11meV). Our photoconductivity measurement imply that graphene devices are suitable for the detection of terahertz radiation.
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