The potential for sensitivity enhancement by the thermoelectric effect in carbon-nanotube and graphene Tera-FETs
Paper in proceedings, 2015

We report on terahertz (THz) measurements with graphene field-effect transistors with integrated antennas (Tera-FETs) lay special emphasis on thermoelectric contributions to the detected THz photoresponse. Graphene Tera-FETs with integrated broad-band bow-tie antennas were fabricated in a CVD-based growth process and were successfully applied for detection at 600 GHz with optical NEPs down to 515 pW/Hz^1/2. While rectification of THz radiation by (distributed) resistive mixing of charge-density waves induced in the gated transistor channel region is well known, significant additional contributions to the detected signal have experimentally been observed and hot-carrier thermoelectric effects have been identified as a possible origin of these signals. We also observe similar signal contributions in carbonnanotube transistors.

CVD graphene

direct terahertz detection

antenna-integrated detectors

Graphene field effect transistors

Author

Maris Bauer

Goethe University Frankfurt

MICHAEL ANDERSSON

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

Audrey Zak

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

P. Sakalas

Technische Universität Dresden

Dovilė Čibiraitė

Vilnius University

Alvydas Lisauskas

Goethe University Frankfurt

Vilnius University

M. Schroter

Technische Universität Dresden

Jan Stake

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

Hartmut Roskos

Goethe University Frankfurt

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 647 1 UNSP 012004- 012004

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Nano Technology

Other Electrical Engineering, Electronic Engineering, Information Engineering

Infrastructure

Nanofabrication Laboratory

DOI

10.1088/1742-6596/647/1/012004

More information

Latest update

3/29/2018