Unveiling the plasma wave in the channel of graphene field-effect transistor
Paper i proceeding, 2019
Coupling an electromagnetic wave at GHz to THz frequencies into the channel of a graphene field-effect transistor (GFET) provokes collective charge carrier oscillations of the two-dimensional electron gas (2DEG) known as plasma waves. Here, we report the very first experimental and direct mapping of the electric field distribution in a gated GFET at nanometer length scales using scattering-type scanning near-field microscopy (s-SNOM) at 2 THz. Based on the experimental results we deduce the plasma wave velocity for different gate bias voltages, which is in good agreement with the theoretical prediction.
THz frequencies
scattering-type scanning near-field microscopy
graphene field-effect transistor
plasma waves
Författare
Amin Soltani
Johann Wolfgang Goethe Universität Frankfurt am Main
Frederik Kuschewski
Technische Universität Dresden
Marlene Bonmann
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Andrey Generalov
Aalto-Yliopisto
Andrei Vorobiev
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Florain Ludwig
Johann Wolfgang Goethe Universität Frankfurt am Main
Matthias M. Wiecha
Johann Wolfgang Goethe Universität Frankfurt am Main
Dovilė Čibiraitė
Johann Wolfgang Goethe Universität Frankfurt am Main
Frederik Walla
Johann Wolfgang Goethe Universität Frankfurt am Main
Susanne C. Kehr
Technische Universität Dresden
Lucas M. Eng
Technische Universität Dresden
Jan Stake
Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik
Hartmut G. Roskos
Johann Wolfgang Goethe Universität Frankfurt am Main
International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
21622027 (ISSN) 21622035 (eISSN)
Vol. 2019-September 8873874
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Paris, France,
Paris, France,
Styrkeområden
Informations- och kommunikationsteknik
Nanovetenskap och nanoteknik
Infrastruktur
Kollberglaboratoriet
Nanotekniklaboratoriet
Drivkrafter
Hållbar utveckling
Ämneskategorier
Elektroteknik och elektronik
Den kondenserade materiens fysik
DOI
10.1109/IRMMW-THz.2019.8873874