A 400-GHz Graphene FET Detector
Journal article, 2017

This letter presents a graphene field effect transistor (GFET) detector at 400 GHz, with a maximum measured optical responsivity of 74 V/W, and a minimum noise-equivalent power of 130 pW/Hz1/2. This letter shows how the detector performance degrades as a function of the residual carrier concentration in the graphene channel, which is an important material parameter that depends on the quality of the graphene sheet and contaminants introduced during the fabrication process. In this work, the exposure of the graphene channel to liquid processes is minimized resulting in a low residual carrier concentration. This is in part, an important contributing factor to achieve the record high GFET detector performance. Thus, our results show the importance to use graphene with high quality and the importance to minimize contamination during the fabrication process.

Detectors

submillimeter wave transistors

submillimeter wave measurements

graphene

field effect transistor (FET)

terahertz (THz)

Author

Andrey Generalov

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

MICHAEL ANDERSSON

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

Xinxin Yang

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

Andrei Vorobiev

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

Jan Stake

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

IEEE Transactions on Terahertz Science and Technology

2156-342X (ISSN)

Vol. 7 5 614-616 7981343

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology (2010-2017)

Infrastructure

Kollberg Laboratory

Nanofabrication Laboratory

Subject Categories

Nano Technology

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics

DOI

10.1109/TTHZ.2017.2722360

More information

Created

10/8/2017