TY  - JOUR
AU  - Doi, Y.
AU  - Wang, Z.
AU  - Ueda, T.
AU  - Nickels, P.
AU  - Komiyama, S.
AU  - Patrashin, M.
AU  - Hosako, I.
AU  - Matsuura, S.
AU  - Shirahata, M.
AU  - Sawayama, Y.
AU  - Kawada, M.
PY  - 2009
DA  - 2009//
TI  - CSIP – a novel photon-counting detector applicable for the SPICA far-infrared instrument
T2  - SPICA
JO  - SPICA
IS  - SPICA Workshop 2009
KW  - detectors
KW  - Infrared
AB  - We describe a novel GaAs/AlGaAs double-quantumwell device for the infrared photon detection, called ChargeSensitive Infrared Phototransistor (CSIP). The principle of CSIP detector is the photo-excitation of an intersubband transition in a QW as an charge integrating gate and the signal ampli<ef><ac><81>cation by another QW as a channel with very high gain, which provides us with extremely high responsivity (104 – 106 A/W). It has been demonstrated that the CSIP designed for the mid-infrared wavelength (14.7 μm) has an excellent sensitivity; the noise equivalent power (NEP) of 7 × 10-19 W/ with the quantum effciency of ~ 2%. Advantages of the CSIP against the other highly sensitive detectors are, huge dynamic range of > 106, low output impedance of 103 – 104 Ohms, and relatively high operation temperature (> 2 K). We discuss possible applications of the CSIP to FIR photon detection covering 35 – 60 μm waveband, which is a gap uncovered with presently available photoconductors.
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ID  - Doi_etal2009
ER  -