A linear-array of 300-GHz antenna integrated GFET detectors on a flexible substrate
Artikel i vetenskaplig tidskrift, 2020

Terahertz imaging has potential in a variety of applications, such as non-invasive inspection, medical examination, and security. Many of these applications call for flexible focalplane arrays with large fields of view. Here, we demonstrate the implementation of a flexible, 300 GHz, 16 linear detector array based on graphene field-effect transistors and integrated bowtie antennas. Conservative estimates based on room temperature measurements at 300 GHz show element voltage responsivities in he range from 20 V/W to 70 V/W, and noise equivalent powers in the range from 0.06 nW/Hz0.5 to 0.2 nW/Hz0.5. Measured radiation patterns, showing good agreement with simulations, reveal half-power beamwidths of 45 and 60 for H- and E-planes, respectively. Characterization of the antenna array in a curved configuration shows that the voltage response is reduced up to 3 dB compared to the flat configuration due to a decrease of the antenna directivity. We believe that our preliminary results could serve as an enabling platform for the future development of flexible antenna arrays based on GFETs for curved focal plane imaging, important for wearable sensors and many other applications.

radiation patterns.

graphene

antenna arrays

field-effect transistors

Terahertz detectors

2D materials

flexible electronics

Författare

Xinxin Yang

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

Andrei Vorobiev

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

Jian Yang

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Antennsystem

Kjell Jeppson

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

Jan Stake

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

IEEE Transactions on Terahertz Science and Technology

2156-342X (ISSN)

Vol. 10 5 554-557

Flexibla terahertz detektorer i grafen

Vetenskapsrådet (VR), 2018-01-01 -- 2021-12-31.

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Infrastruktur

Kollberglaboratoriet

Nanotekniklaboratoriet

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1109/TTHZ.2020.2997599

Mer information

Senast uppdaterat

2020-10-23