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 (MC2), Terahertz- och millimetervågsteknik

Andrey Generalov

Aalto-Yliopisto

Andrei Vorobiev

Chalmers, Mikroteknologi och nanovetenskap (MC2), 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 (MC2), 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,

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik (2010-2017)

Infrastruktur

Kollberglaboratoriet

Nanotekniklaboratoriet

Drivkrafter

Hållbar utveckling

Ämneskategorier

Elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1109/IRMMW-THz.2019.8873874

Mer information

Senast uppdaterat

2019-11-19