- Nanowire Terahertz detectors with a resonant four-leaf-clover-shaped antenna doi link

Auteur(s): Viti L, Coquillat D., Ercolani D, Sorba L, Knap W., Vitiello M. S.

(Article) Publié: Optics Express, vol. 22 p.8996 (2014)

Ref HAL: hal-00981498_v1
PMID 24787788
DOI: 10.1364/OE.22.008996
WoS: 000335902200017
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We report on the development of an innovative class of nanowire-based Terahertz (THz) detectors in which the metamaterial properties of an antenna have been imported in the detection scheme of an overdamped plasma-wave field-effect transistor making its response resonant to THz radiation. Responsivities of ~105 V/W at 0.3THz, with noise equivalent power levels ≈10−10W/√Hz, detectivities ~2*108cm√Hz/W and quantum efficiencies ~1.2*10−5 are reached at room-temperature. The resonant nature of the detection scheme provided by the four-leaf-clover-shaped geometry and the possibility to extend this technology to large multi-pixel arrays opens the path to demanding applications for ultra-sensitive metrology, spectroscopy and biomedicine.