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

Författare

Maris Bauer

Johann Wolfgang Goethe Universität Frankfurt am Main

MICHAEL ANDERSSON

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

Audrey Zak

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

P. Sakalas

Technische Universität Dresden

Dovilė Čibiraitė

Vilniaus universitetas

Alvydas Lisauskas

Johann Wolfgang Goethe Universität Frankfurt am Main

Vilniaus universitetas

M. Schroter

Technische Universität Dresden

Jan Stake

Chalmers, Mikroteknologi och nanovetenskap (MC2), Terahertz- och millimetervågsteknik

Hartmut Roskos

Johann Wolfgang Goethe Universität Frankfurt am Main

Journal of Physics: Conference Series

1742-6588 (ISSN)

Vol. 647 1 UNSP 012004- 012004

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik

Ämneskategorier

Nanoteknik

Annan elektroteknik och elektronik

Infrastruktur

Nanotekniklaboratoriet

DOI

10.1088/1742-6596/647/1/012004

Mer information

Senast uppdaterat

2018-03-29