Unveiling the plasma wave in the channel of graphene field-effect transistor
Paper in proceedings, 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

Author

Amin Soltani

Goethe University Frankfurt

Frederik Kuschewski

Technische Universität Dresden

Marlene Bonmann

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Andrey Generalov

Aalto University

Andrei Vorobiev

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Florain Ludwig

Goethe University Frankfurt

Matthias M. Wiecha

Goethe University Frankfurt

Dovilė Čibiraitė

Goethe University Frankfurt

Frederik Walla

Goethe University Frankfurt

Susanne C. Kehr

Technische Universität Dresden

Lucas M. Eng

Technische Universität Dresden

Jan Stake

Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory

Hartmut G. Roskos

Goethe University Frankfurt

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,

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology (2010-2017)

Infrastructure

Kollberg Laboratory

Nanofabrication Laboratory

Driving Forces

Sustainable development

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics

DOI

10.1109/IRMMW-THz.2019.8873874

More information

Latest update

11/19/2019