Browsing by Author "Wu, J. -Y."

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Crossover from negative to positive magnetoresistance in a Si delta-doped GaAs single quantum well
(2010-07-01)
Lo, Shun-Tsung
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Chen, Kuang Yao
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Su, Yi-Chun
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Liang, C. -T.
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Chang, Y. H.
We have performed magnetoresistance measurements on a Si delta-doped GaAs single quantum well With increasing temperature T, a crossover from negative magnetoresistance (NMR) to positive magnetoresistance (PMR) can be observed Our experimental results suggest that such a crossover corresponds to a transition from variable range hopping regime to activated electron transport. This is also consistent with the measured non-monotonic carrier density dependence on T. (C) 2010 Elsevier Ltd All rights reserved.
Radiometric temperature measurement with Si and InGaAs single-photon avalanche photodiode
(2014-10-01)
Wu, J. -Y.
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Lu, P. -K.
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Hsiao, Y. -J.
;
Lin, S. -D.
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電子工程學系及電子研究所
We experimentally demonstrate the use of single-photon avalanche photodiode (SPAD) for radiometric temperature measurement. The low dark count rate CMOS SPAD and a commercial InGaAs/InP SPAD can detect the thermal radiation from a blackbody down to the temperatures of 510 and 405 K, respectively. Our work shows that current SPADs are cost-effective thermal sensors for various applications. (C) 2014 Optical Society of America