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OSP Final Research Reports
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ItemExpitaxial growth of Ga-N based LEDs on simple sacrificial substrates(Georgia Institute of Technology, 12/31/2009) Ferguson, Ian T. ; Summers, Christopher J.
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ItemEpitaxial growth of GaN-based LEDs on simple sacrificial substrates(Georgia Institute of Technology, 2009-12-21) Ferguson, Ian T. ; Summers, Christopher J.
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ItemDirect measurement of wafer temperature in white/UV LED manufacture(Georgia Institute of Technology, 2008-02-01) Ferguson, Ian T.
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ItemDevelopment of ZnO-GaN hybrid spin LED(Georgia Institute of Technology, 2007-10-15) Ferguson, Ian T.
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ItemAlGaN material structures for a two color UV imager(Georgia Institute of Technology, 2007-08) Ferguson, Ian T. ; Jamil, MuhammadGaN/AlGaN dual-band detectors responding in UV and IR regions based on interband and intraband transitions have been developed. These dual-band detectors simultaneously detect UV radiation in the 250–360 nm and IR radiation in the 5–14 μm regions with near zero spectral cross talk. MOCVD growth and process conditions were optimized for GaN and AlGaN thin films as well as for device structures to improve the efficiency of devices. Also, by etching out the top-contact layer, it was shown that the UV response of the detector can be enhanced. Having separate UV- and IR-active regions with three contacts (one common contact for both regions) allows the separation of the UV and IR generated photocurrent components, identifying the relative strength of each component. This is an important development in UV–IR dual-band applications such as fire–flame detection, solar astronomy, and military sensing, eliminating the difficulties of employing several individual detectors with separate electronics–cooling mechanisms.
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ItemHigh efficiency green emitter(Georgia Institute of Technology, 2007-06-07) Ferguson, Ian T. ; Nause, Jeff ; Nemeth, Bill
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ItemMOCVD growth of multifunctional III-nitride quantum dots(Georgia Institute of Technology, 2007-04) Ferguson, Ian T. ; Kane, Matthew ; Gupta, Shalini
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ItemInnovative development of next generation and energy efficient solid state light sources for general illumination(Georgia Institute of Technology, 2006-11-30) Ferguson, Ian T. ; Summers, Christopher J.