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Proceedings Paper

Photon upconversion devices for imaging
Author(s): H. C. Liu; H. Luo; D. Ban; M. Buchanan; Z. R. Wasilewski; A. J. SpringThorpe; P. J. Poole
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Paper Abstract

This paper reviews our research on photon upconversion devices for wavelengths from 1.5 μm to 0.87 μm. The 1.5 μm is chosen for its importance for eye-safe active imaging; whereas 0.87 μm corresponds to the bandgap of GaAs which is the active region of our high efficiency light emitting diode (LED). The basic idea is to integrate a 1.5 μm detector with a 0.87 µm LED, connected in series. The detected photocurrent drives the LED, thereby achieving the upconversion. Various approaches of integration methods and device designs have been tested. The upconversion approach provides an alternative to the standard hybrid integration with readout circuits and may be advantageous for some applications.

Paper Details

Date Published: 11 March 2008
PDF: 7 pages
Proc. SPIE 6984, Sixth International Conference on Thin Film Physics and Applications, 698431 (11 March 2008); doi: 10.1117/12.792384
Show Author Affiliations
H. C. Liu, National Research Council Canada (Canada)
H. Luo, National Research Council Canada (Canada)
D. Ban, Univ. of Waterloo (Canada)
M. Buchanan, National Research Council Canada (Canada)
Z. R. Wasilewski, National Research Council Canada (Canada)
A. J. SpringThorpe, National Research Council Canada (Canada)
P. J. Poole, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 6984:
Sixth International Conference on Thin Film Physics and Applications

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