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Proceedings Paper

Ultrafast quantum well infrared photo detector
Author(s): Peter D. Grant; Richard Dudek; Lynne Wolfson; Margaret Buchanan; Hui Chun Liu
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Paper Abstract

Quantum well infrared photo-detectors (QWIP) have found numerous application as sensitive fast photo-detectors. Applications for fast detectors include laser diagnostics, telecommunications and Compton scattering measurements. The high speed potential of QWIPs is enabled by a short carrier lifetime in the order of 5 pS. This short lifetime permit's design of a 40 GHz bandwidth detector. In this paper we report on the development of a QWIP with an integrated electrical co-planar waveguide. The QWIP is a 100 well structure that is almost completely absorbing over the wavelength range of 9 to 11 microns. Free space radiation at 105 GHz has been observed from these QWIPs, but devices made to exploit this speed have not yet been developed. It is necessary to integrate an electrical co-planar waveguide with the QWIP mesa. In this work we report on a QWIP fabricated with a gold air bridge to connect the top of the mesa to the center line of a gold co-planar waveguide. The co-planar waveguide is tapered to allow direct connection to 2.4 mm and smaller electrical cable. Initial tests indicate that the device has a 40 GHz or greater bandwidth.

Paper Details

Date Published: 9 December 2004
PDF: 6 pages
Proc. SPIE 5578, Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education, (9 December 2004); doi: 10.1117/12.567260
Show Author Affiliations
Peter D. Grant, National Research Council (Canada)
Richard Dudek, National Research Council (Canada)
Lynne Wolfson, National Research Council (Canada)
Margaret Buchanan, National Research Council (Canada)
Hui Chun Liu, National Research Council (Canada)

Published in SPIE Proceedings Vol. 5578:
Photonics North 2004: Photonic Applications in Astronomy, Biomedicine, Imaging, Materials Processing, and Education
Marc Nantel; Glen Herriot; Graham H. McKinnon; Leonard MacEachern; Robert A. Weersink; Rejean Munger; Andrew Ridsdale, Editor(s)

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