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Friday April 22, 2005
2:30 PM
PHO 339

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"Infrared Solution-Processed Quantum Dot Devices"
Prof. Edward (Ted) H Sargent
University of Toronto

Colloidal nanocrystals are quantum size-effect tunable; offer an abundance of available surface for electronic and chemical interaction; and are processible from organic or aqueous solution onto substrates rigid or flexible, smooth or rough, flat or curved, inorganic, organic, including biological, crystalline or amorphous, conducting, semiconducting, or insulating.

With the benefit of over a decade's progress in visible-emitting colloidal quantum dot synthesis, physical chemistry, and devices, significant progress has recently been made in infrared-active colloidal quantum dots and devices.

I will review the field of infrared colloidal quantum dots, placing emphasis on applications and devices, and focusing in particular my own research group's contributions in electroluminescence, photoconductive, photovoltaic, nonlinear optical, and optical amplification-based devices. The applications surveyed will include monolithic integration of fibre-optic and free-space communications photonic components on electronic substrates such as silicon and glass; in vivo biological tagging in infrared spectral bands in which living tissue is optically penetrable to a depth of up to 10 cm; solar and thermal photovoltaics for energy conversion; and infrared sensing and imaging based on non-visible, including thermal, signatures.

Biography of the Speaker: In 2003 Ted Sargent was named "one of the world's top young innovators" by MIT's Technology Review. In 2002 he was honoured by the Canadian Institute for Advanced Research as one of Canada's top twenty researchers under age forty. In 2002 he won the Outstanding Engineer Award of the Institute of Electrical and Electronics Engineers (IEEE) of Canada "...For groundbreaking research in applying new phenomena and materials from nanotechnology towards transforming fibre-optic communications systems into agile optical networks." He was awarded a Canada Research Chair at the University of Toronto in 2000: "[Ted Sargent] has created a new type of laser that unites many sophisticated optical devices onto a single, integrated photonic chip. His research links the emerging concept of the photonic circuit with the exploding field of fibre optic networks. Ted Sargent's doctoral research on the lateral current injection laser won him the 1999 NSERC Silver Medal. He received the B.Sc.Eng. (Engineering Physics) from Queen's University in 1995 and the Ph.D. in Electrical and Computer Engineering (Photonics) from the University of Toronto in 1998. More information is available at: link

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