[BNC-all] REMINDER: Nano Seminar: Gary P. Wiederrech, Chemistry Division and Center for Nanoscale Materials, Argonne National Laboratory, Friday, 10/27/06, @ 3:30 PM in BRK 1001 (Nanoscale Plasmonic Heterostructures)

[Annie Cheever]

"Nanoscale Plasmonic Heterostructures"

Friday, October 27, 2006
3:30 PM
Birck Nanotechnology Center, Room 1001

Gary P. Wiederrecht
Chemistry Division and Center for Nanoscale Materials
Argonne National Laboratory, Argonne, Illinois 60439-4831


Surface plasmons are electromagnetic modes that are present at the 
interface of a metal and dielectric material. Depending upon the 
structure of the metal, surface plasmons demonstrate a wide range of 
characteristics, such as optical field enhancements, tunable 
resonances, and the ability to propagate in films or be confined at 
nanoparticle defects. As a result, surface plasmons continue to 
generate growing interest for new sensor technologies, energy 
transport, and photonics applications. In many cases, the most 
interesting advantages of surface plasmons lie in the optical 
near-field, significantly below the diffraction limit of conventional 
optics in at least one dimension. This requires novel methods for 
imaging the spatial profile and propagation properties of surface 
plasmons, as well as novel spectroscopies for studying photochemistry 
of heterostructured materials in the near-field. In this talk, recent 
efforts in our group for the imaging and spectroscopy of plasmonic 
heterostructures are discussed. Specific examples include plasmonic 
continuum spectroscopy, metal nanoparticle photoluminescence, the use 
of photoresponsive polymers for near-field optical imaging, and 
coherent coupling of molecular excitons to surface plasmons.

Gary Wiederrecht, received a B.S. in chemistry in 1987 from the 
University of California, Berkeley and a Ph.D. in physical chemistry 
from the Massachusetts Institute of Technology in 1992. His thesis 
research was in the area of ultrafast pulseshaping and spectroscopy 
of soft phonon modes in organic and inorganic ferroelectric crystals. 
He joined Argonne as a postdoctoral fellow in 1992, and in 1995 
became a staff member specializing in ultrafast spectroscopy of 
photoinduced electron transfer reactions. He is currently a Chemist 
and Group Leader of the Nanophotonics Group in the Chemistry Division 
and Acting Group Leader of the Nanophotonics Group in the Center for 
Nanoscale Materials. His current research is focused on the 
near-field and far-field spectroscopies of metallic and hybrid 
organic-metallic nanostructures, with an emphasis on their 
nanophotonic and charge storage capabilities.

Host:  Vladimir Shalaev/Samuel Gresillion ECE Department, (49855, 
shalaev at purdue.edu)

SPONSORED BY:
Birck Nanotechnology Center, Bindley Bioscience Center, Discovery 
Park, The NASA Institute for Nanoelectronics and Computing, The 
Network for Computational Nanotechnology, VEECO, NCN Student 
Leadership Council, Department of Chemistry, Department of Physics, 
School of Chemical Engineering, School of Electrical and Computer 
Engineering, School of Mechanical Engineering
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Annie Cheever, Area Secretary                      
School of Electrical and Computer Engineering 
	                                                                 
 
acheever at purdue.edu
			  
Purdue University
Birck Nanotechnology Center, Room 2027
1205 West State Street
West Lafayette, IN  47907-2057

Phone: 765-496-8327     Fax: 765-496-6443     http://www.nano.purdue.edu/  
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