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Thermoelectric graphene photodetectors with sub-nanosecond response times at terahertz frequencies

Published version
Peer-reviewed

Type

Article

Change log

Authors

Viti, L 
Cadore, AR 
Yang, X 
Vorobiev, A 
Muench, JE 

Abstract

Ultrafast and sensitive (noise equivalent power <1 nWHz-1/2) light-detection in the Terahertz (THz) frequency range (0.1-10 THz) and at room-temperature is key for applications such as time-resolved THz spectroscopy of gases, complex molecules and cold samples, imaging, metrology, ultra-high-speed data communications, coherent control of quantum systems, quantum optics and for capturing snapshots of ultrafast dynamics, in materials and devices, at the nanoscale. Here, we report room-temperature THz nano-receivers exploiting antenna-coupled graphene field effect transistors integrated with lithographically-patterned high-bandwidth (~100 GHz) chips, operating with a combination of high speed (hundreds ps response time) and high sensitivity (noise equivalent power <120 pWHz-1/2) at 3.4 THz. Remarkably, this is achieved with various antenna and transistor architectures (single-gate, dual-gate), whose operation frequency can be extended over the whole 0.1-10 THz range, thus paving the way for the design of ultrafast graphene arrays in the far infrared, opening concrete perspective for targeting the aforementioned applications.

Description

Keywords

2D materials, nano-detectors, terahertz frequencies

Journal Title

Nanophotonics

Conference Name

Journal ISSN

2192-8606
2192-8614

Volume Title

10

Publisher

Walter de Gruyter GmbH
Sponsorship
Royal Society (TG102524)
Engineering and Physical Sciences Research Council (EP/K01711X/1)
Engineering and Physical Sciences Research Council (EP/K017144/1)
Engineering and Physical Sciences Research Council (EP/M507799/1)
European Commission (604391)
Engineering and Physical Sciences Research Council (EP/L016087/1)
European Commission Horizon 2020 (H2020) ERC (206409)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (696656)
EPSRC (via University of Manchester) (R119256)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (785219)
Engineering and Physical Sciences Research Council (EP/G042357/1)
The Royal Society (wm090070)
European Research Council (319277)
Engineering and Physical Sciences Research Council (EP/P024947/1)
Engineering and Physical Sciences Research Council (EP/S019367/1)
Engineering and Physical Sciences Research Council (EP/R00661X/1)
European Research Council (842251)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (881603)