Terahertz detection and emission by field-effect transistors

Wojciech Knap, Nina V. Dyakonova, Franz Schuster, Dominique Coquillat, Frédéric Teppe, Beno Ît Giffard, Dmytro B. But, Oleksander G. Golenkov, Fedor F. Sizov, Takayuki Watanabe, Youichi Tanimoto, Taiichi Otsuji

研究成果: Conference contribution

2 被引用数 (Scopus)


The concept of THz detection based on excitation of plasma waves in two-dimensional electron gas in Si FETs is one of the most attractive ones, as it makes possible the development of the large-scale integrated devices based on a conventional microelectronic technology including on-chip antennas and readout devices integration. In this work we report on investigations of Terahertz detectors based on low-cost silicon technology field effect transistors and asymmetric unit cell double grating gate field effect transistor. Double-grating-gate field-effect transistors have a great potential as terahertz detectors. This is because the double grating gate serves not only for carrier density tuning but also as an efficient THz radiation coupler. In this paper, we present characterization of these transistors using high magnetic fields. Low and high magnetic field data are used to determine the electron mobility and electron concentration, respectively, in different parts of the transistor channel. We show that detectors, consisting of a coupling antenna and a n-MOS field effect transistor as rectifying element, are efficient for THz detection and imaging. We demonstrate that in the atmospheric window around 300 GHz, these detectors can achieve a record noise equivalent power below 10 pW/Hz0.5 and responsivity above 90 kV/W once integrated with on-chip amplifier. We show also that they can be used in a very wide frequency range: from ̃0.2 THz up to 1.1 THz. THz detection by Si FETs paves the way towards high sensitivity silicon technology based focal plane arrays for THz imaging.

ホスト出版物のタイトルTerahertz Emitters, Receivers, and Applications III
出版ステータスPublished - 2012 12月 1
イベントTerahertz Emitters, Receivers, and Applications III - San Diego, CA, United States
継続期間: 2012 8月 122012 8月 13


名前Proceedings of SPIE - The International Society for Optical Engineering


OtherTerahertz Emitters, Receivers, and Applications III
国/地域United States
CitySan Diego, CA

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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