Date:
-
Location:
CP179
Speaker(s) / Presenter(s):
Ali Oguz Er (Western Kentucky University)
Various uses of lasers will be presented. A review of the nucleation and growth
studies by Pulsed Laser Deposition (PLD) using in-situ reflection high energy electron
diffraction (RHEED), atomic force microscopy (AFM), and scanning tunneling
microscopy (STM) will be given.
Nanoscale heat transport across the Cu/Ag(111) interface and the transient
structural disorder in Ag(111) crystal after excitation of the 18 nm copper with
femtosecond pulses was studied by means of time resolved X-ray diffraction. The lattice
disorder after UV irradiation is detected by changes in peak shift and broadening of the
XRD rocking curve. We have observed blast force and pressure wave propagation.
The photo-inactivation rate of bacteria by methylene blue, MB, was found to be
significantly lower in plasma than in water, saline, and PBS solutions. The spectroscopic
data and ultrafast time resolved transient spectra and kinetics presented, show that
methylene blue under continuous wave red light (~660 nm) photo-bleaches faster and to
a larger degree in plasma and the MB excited singlet and triplet state populations in
plasma are much lower in plasma than in water and PBS solutions.
Lastly, ongoing quantum control experiments by using femtosecond lasers in
nonlinear media at Princeton University will be presented.