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Wake Forest Physics…
Nationally recognized for teaching excellence;
internationally respected for research advances;
a focused emphasis on interdisciplinary study and close student-faculty collaboration.
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Special WFU Physics and Chemistry Colloquium
TITLE:
Three presentations from Visiting Faculty from
the Wroclaw University of Technology.
SPEAKERS:
Professors Jan Misiewicz, Andrzej Ozyhar, and Andrzej Miniewicz
,
Departments of Chemistry and Physics,
Wroclaw University of Technology, Wroclaw Poland
TIME: Monday April 11, 2011 at 2:00 - 3:30 PM
PLACE: Room 101 Olin Physical Laboratory
All interested persons are cordially invited to attend.
ABSTRACTS
Optical spectroscopy of semiconductor nanostructures
Jan Misiewicz, Institute of Physics
Short presentation of Wroclaw University of Technology will be followed by
description of the research activity at the Institute of Physics. It
concentrates on: condensed matter theory; semiconductor structures;
dielectrics and glasses; as well as - fiber, visual and singular optics.
Finally the research carried on at the Laboratory of the Optical
Spectroscopy of Nanostructures will be presented: epitaxial quasi-zero
dimensional III-V structures; mid-infrared III-V structures for laser
based gas sensing; III-V nitrides for optoelectronic applications in near
infrared and UV regions; optical properties of nanocrystalline materials.
The investigations are oriented towards applications in optoelectronic
devices.
Overview of BioResearch-oriented Projects
Andrzej Ozyhar, Faculty of Chemistry
The
Faculty of Chemistry at the Wroclaw University of Technology was founded
after the Second World War in 1945, inheriting traditions of the Lviv
Polytechnic. For more than sixty years the Faculty has been one of the
best chemistry faculties in Poland, developing fundamental and applied
chemistry. Currently, our faculty is the biggest one in Poland with more
then 200 faculty members and over 3000 students. At the Faculty research
in traditional Jields of organic, inorganic, physical and theoretical
chemistry is accompanied by cutting edge interdisciplinary research
involving biotechnology and material science. The presentation will
provide an overview of BioResearch-‐oriented groups of the Faculty.
Photonics and Nonlinear Optics in Organic Materials: Molecular Crystals,
Liquid crystals, polymers and hybrid materials
Andrzej Miniewicz, Institute of Physical and Theoretical
Chemistry
Presentation will include short description of the scientific activity of
a part of the Institute of Physical and Theoretical Chemistry devoted to
studies of spectroscopic, optical and electrical properties of organic
materials at various levels of their organization including molecules,
crystals, liquid crystals, amorphous polymers, functionalized polymers and
composite materials containing nanoparticles of metal, semiconductors and
dielectrics.
The research conducted in the Group of Physics and Chemistry of Molecular
Materials in recent years is firmly related with the studies of induced by
light local changes of refractive index in photochromic materials mainly
those containing azo-benzene groups. The bulk and surface
photorefractivity and photochromism, due to material functionalization
with NLO chromophores, optically bistable molecules or nanoparticles have
found applications in dynamic holography, optical processing, light
amplification and image correlation as well as in formation of phase
conjugate mirrors, optically addressed spatial light modulators and
others. We study light-driven orientation of molecules both experimentally
and theoretically. For these investigations we are using the modified
degenerate two-wave mixing experiment, optical Kerr effect, grating
translation method, dynamic holography methods and Monte Carlo
simulations. Polarization gratings and surface relief in azopolymers are
currently studied as they involve complex molecular mechanisms. We discuss
also mechanisms of nanosopic formation of surface relief structures
obtained by direct laser inscription method.
Part of our activity is devoted to studies of amplified spontaneous
emission which lead to lasing in polymers doped with suitable dyes.
Particularly interesting are DNA-based polymers which form novel matrix
for dyes as well as liquid-crystallinity of DNA itself. Classic NLO
properties such as second harmonic generation SHG or two-photon absorption
TPA are continuously investigated for novel crystals and molecules e.g.
organometallic compounds.
We wish to combine our expertise in NLO optics with emerging technologies
using plasmonic effects in metal nanoparticles for enhancing optical and
electrical properties of various systems e.g. liquid crystals. We plan to
extend our research toward formation of photonic and plasmonic crystal
structures involving organometallic nonlinear chromophores studying
photonic band gap effects and plasmonic enhancement effects.
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