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Proceedings Paper

High photoresponse in room-temperature quantum cascade detectors based on a coupled-well design
Author(s): T. Dougakiuchi; K. Fujita; T. Hirohata; A. Ito; M. Hitaka; T. Edamura
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Paper Abstract

A high photoresponse in a room-temperature quantum cascade detector (QCD) based on a coupled quantum-well design is demonstrated with a peak detection wavelength of 5.4 μm. In this design, forward electron transfer is engineered to be five times as large as relaxation back to ground level. In this situation, the coupled quantum-well QCD indicates a high responsivity of 22 mA/W as well as a specified detectivity (D*) of 8.0×107 cmW-1Hz1/2, both at room-temperature with commonly used 45° wedge configuration. Applying a waveguide configuration for the proposed QCD, an elevated responsivity of ~130 mA/W with a D* of 1.1×108 cmW-1Hz1/2 was obtained at room-temperature. A laser absorption spectroscopy for N2O gas with proposed QCD and a distributed feedback quantum cascade laser has been also demonstrated.

Paper Details

Date Published: 27 January 2017
PDF: 8 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 101112D (27 January 2017); doi: 10.1117/12.2250468
Show Author Affiliations
T. Dougakiuchi, Hamamatsu Photonics K.K. (Japan)
K. Fujita, Hamamatsu Photonics K.K. (Japan)
T. Hirohata, Hamamatsu Photonics K.K. (Japan)
A. Ito, Hamamatsu Photonics K.K. (Japan)
M. Hitaka, Hamamatsu Photonics K.K. (Japan)
T. Edamura, Hamamatsu Photonics K.K. (Japan)

Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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