Graphene-based THz photodetector by noise-thermometric technique

Author

Ming-Jye Wang ; Ji-wun Wang ; Hsian-Hong Chang ; Yen-Yu Chiang

Author_Institution

Inst. of Astron. & Astrophys., Taipei, Taiwan

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

Terahertz (THz) photo-detectors, consisting of a r graphene nano-bridge and a plane antenna have been fabricated c and characterized. Hot electrons in graphene-bridge (GB) are generated after absorbing the incident THz photons. We measured the amplified thermal noise power from hot electrons to sense the absorbed THz power. By using this noise-thermometric technique, a THz photodetector with temperature responsivity of 5 K/nW has been achieved. We also demonstrated that the heat relaxation of nano-GB is dominated by electron diffusion process.

Keywords

graphene; hot carriers; nanostructured materials; photodetectors; temperature measurement; terahertz wave detectors; C; electron diffusion; graphene nano-bridge; graphene-based THz photodetector; heat relaxation; hot electrons; incident THz photon; noise-thermometric technique; plane antenna; temperature responsivity; therm al noise power; Detectors; Graphene; Heating; Noise; Photodetectors; Photonics; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956248

Filename

6956248