Single Photon Detection in the Long Wave Infrared

  • T. Ueda
  • Z. An
  • K. Hirakawa
  • S. Komiyama
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 119)

Abstract

We developed a novel single-photon detector in the long wave infrared (LWIR) spectral region. The detector is a charge-sensitive infrared phototransistor (CSIP) fabricated in a GaAs/AlGaAs double quantum well (QW) structure, in which a photo-generated hole (+e) in the floating gate (upper QW) modulates the capacitively-coupled conductance of the underneath channel (lower QW). The high responsivity (R=4×106A/W) and specific detectivity (D*=1×1015cmHz1/2/W) are achieved. The dynamic range is extended beyond 107 (∼aW to pW) by repeatedly resetting the accumulated holes in the upper QW. The simple structure is feasible for detector array fabrication.

Keywords

Quantum Well Double Quantum Noise Equivalent Power High Responsivity Single Photon Detection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media B.V 2008

Authors and Affiliations

  • T. Ueda
    • 1
  • Z. An
    • 1
  • K. Hirakawa
    • 2
  • S. Komiyama
    • 1
  1. 1.Department of Basic ScienceUniversity of TokyoTokyoJapan
  2. 2.Institute of Industrial ScienceUniversity of TokyoTokyoJapan

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