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EXCITONICS SEMINAR SERIES
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http://www.rle.mit.edu/excitonics/images/mceuen_001.jpg]
Paul McEuen
Department of Physics
Cornell University
Kavli Institute at Cornell for Nanoscale Science
Light and Fast: Probing Carriers and Vibrations in 1D and 2D Materials
Thursday, April 17, 2014
RLE Conference Room - 36-428
3:00 - 4:00pm
Abstract:
Carbon nanotubes and 2D atomic membrane materials cut across many disciplines with their
remarkable optical, thermal, mechanical, and electronic properties. In this talk we will
examine cases when a combination of properties, e.g. optical and mechanical, are
simultaneously important. First, we will discuss ultrafast optoelectronic measurements of
graphene p-n junctions that probe the fundamental thermal relaxation processes for excited
carriers. Next, we will discuss experiments where circularly polarized light creates a
valley polarization in an MoS2 monolayer, leading to a Hall effect in the absence of a
magnetic field. Finally, we will discuss experiments where individual carbon nanotubes are
picked up with micron sized tweezers. These tweezers double as electrical probes, allowing
us to simultaneously study the optical, electronic, thermal, and vibrational properties of
nanotubes as they are strained or buckled.
Bio
Paul L. McEuen is the Goldwin Smith Professor of Physics at Cornell University. He directs
the Laboratory of Atomic and Solid State Physics and the Kavli Institute at Cornell for
Nanoscale Science. His research focuses on nanoscale electronic, optical, and mechanical
properties of graphene, nanotubes, and related materials. He received his B.S. degree in
Engineering Physics from the University of Oklahoma in 1985 and his Ph.D. in Applied
Physics from Yale University in 1991. He joined the faculty at UC-Berkeley in 1992 before
coming to Cornell in 2001. Awards and honors include a Packard Foundation Fellowship, a
National Young Investigator Fellowship, and the Agilent Europhysics Prize. He is a fellow
of the American Physical Society and a member of the National Academy of Sciences. He is
also a novelist, and his scientific thriller SPIRAL was named the debut thriller of the
year by the International Thriller Writers Association.
Light refreshement will be served
The Center for Excitonics is an Energy Frontier Research Center funded by the U.S.
Department of Energy, Office of Science and Office of Basic Energy Sciences