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8 May 2009 Integrated amplification and passivation nanolayers for ultra-high-sensitivity photodetector arrays: application for laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy
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Abstract
Miniaturized field-deployable spectrometers used for the rapid analysis of chemical and biological substances require high-sensitivity photo detectors. For example, in a Raman spectroscopy system, the receiver must be capable of high-gain, low-noise detection performance due to the intrinsically weak signals produced by the Raman effects of most substances. We are developing a novel, high-gain hetero-junction phototransistor (HPT) detector which employs two nano-structures simultaneously to achieve 100 times higher sensitivity than InGaAs avalanche photodiodes, the most sensitive commercially available photo-detector in the near infrared (NIR) wavelength range, under their normal operation conditions. Integrated into a detector array, this technology has application for Laser- Induced Breakdown Spectroscopy (LIBS), pollution monitoring, pharmaceutical manufacturing by reaction monitoring, chemical & biological transportation safety, and bio-chemical analysis in planetary exploration.
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Patrick Gardner, Jie Yao, Sean Wang, Jack Zhou, Ken Li, Irina Mokina, Michael Lange, Weiguo Yang, Leora Peltz, Robert Frampton, Jeffrey H. Hunt, and Jill Becker "Integrated amplification and passivation nanolayers for ultra-high-sensitivity photodetector arrays: application for laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy", Proc. SPIE 7304, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing X, 730411 (8 May 2009); https://doi.org/10.1117/12.821922
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