PHYSICS
AND ASTRONOMY
Science
at the Edge
Friday,
January 22, 2010
11:30a
1400
Biomedical & Physical Sciences Bldg
Refreshments
at 11:15a in 1400 BPS Bldg
Steven
Cundiff
University
of Colorado- Boulder
“Optical
Two-Dimensional Spectroscopy of Semiconductor Nanostructures”
Optical
two-dimensional Fourier transform spectroscopy of provides detailed information
about coupling between optical excitations and relaxation between states.
In semiconductors, the low-temperature optical response near the band-gap is
dominated by bound electron-hole pairs known as excitons. In
semiconductor quantum wells, the polarization dependence of the spectra
provides insight into interplay between excitons and biexcitonic states and
localization due to disorder. In natural semiconductor quantum dots,
the capture of electron-hole pairs from quantum well to quantum dot
states can be observed.
**local
host Prof. Chih-Wei Lai , Dept. Physics and Astronomy ([log in to unmask])***