Oklahoma State Physics Department
Seminars and Colloquia, July through December, 1996
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Click here for this week's schedule.
Seminars and Colloquia, Typical Week:
Laser and Photonics Research Seminar:
Date: | Monday (usually) |
Time: | 4:00 PM |
Place: | NRC 108 |
Inquiries: | jpw519@vms.ucc.okstate.edu |
| or by phone at 4-5807 |
Oklahoma High Energy Physics Seminar
on Talk-Back Television:
Date: | Thursday |
Time: | 1:30 PM |
Place: | Classroom Building, Room 106 |
| & Carson Hall, Room 438, OU |
Inquiries: | physmas@mvs.ucc.okstate.edu |
| shaown@vms.ucc.okstate.edu |
Physics Colloquium:
Date: | Thursday |
Time: | 4:00 PM |
Place: | PS 110 |
Inquiries: | pos@vms.ucc.okstate.edu |
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Date: | Friday |
Time: | 1:00 PM |
Place: | PS 147 |
Inquiries: | jhhp@jperk.phy.okstate.edu |
Oklahoma State Physics Department
Seminars and Colloquia, July 15-19, 1996
Extra Condensed Matter Seminar:
Speaker: | Dr. X. R. Wang |
| Department of Physics,
Hong Kong Univ. of Sci. & Tech. |
Date: | Monday, July 15, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | Negative Magnetoresistance
in the Nearest-neighbor Hopping Conduction |
Oklahoma State Physics Department
Seminars and Colloquia, July 22-26, 1996
Laser and Photonics Center Seminar:
Speaker: | Dr. Hermann Harde |
| Universitaet fuer Bundeswehr
Hamburg, Germany |
Date: | Wednesday, July 24, 1996 |
Time: | 10:00 AM |
Place: | NRC 207 |
Title: | Molecular Spectroscopy with
Femtosecond Terahertz Pulses |
Abstract:
Generation and detection of THz pulses.
Experimental set-up for TDS of molecules.
Measurement on methyl halides.
Theoretical modeling and analysis.
What new informations are found?
Oklahoma State Physics Department
Seminars and Colloquia, July 29 - Aug.2, 1996
No activities
Oklahoma State Physics Department
Seminars and Colloquia, August 5-9, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Penger Tong |
| Department of Physics, OSU |
Date: | Thursday, August 8, 1996 |
Time: | 4:00 PM |
Place: | NRC 207 |
Title: | Recent Velocity Measurements
in Turbulent Thermal Convection Using Lasers |
Oklahoma State Physics Department
Seminars and Colloquia, August 12-16, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Rene Beigang |
| Universitaet der Kaiserslautern,
Kaiserslautern, Germany |
Date: | Thursday, August 15, 1996 |
Time: | 4:00 PM |
Place: | NRC 305 |
Title: | Laser Pulse Propagation Studies
Involving Rydberg States |
Oklahoma State Physics Department
Seminars and Colloquia, August 19-23, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Al Rosenberger |
| Department of Physics, OSU |
Date: | Monday, August 19, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Transit-Induced Optical
Multistability |
Coffee and cookies will be served
before the talk.
Oklahoma State Physics Department
Seminars and Colloquia, August 26-30, 1996
Physics Colloquium:
Speaker: | Dr. Charles M. Bowden |
| Research Development and
Engineering Center, Redstone Arsenal, Alabama |
Date: | Thursday, August 29, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Photonic Band Gap Materials
and Applications |
Abstract:
Photonic band-gap materials are to
photons and light beams as semiconductors
are to electrons and electrical currents.
Vector solutions of Maxwell's equations
in 3-D periodic dielectric structures
give rise to frequency pass bands and
stop bands. A rather exotic property is
a genuine 3-D stop band, or band gap.
Radiative properties of atomic excitation
and atomic dipole coupling via the
radiation field density of states are
discussed, as well as effects of
defect-induced local modes, microgravity
effects, and some aspects of the physics
of the band edge. Several linear and
nonlinear optical device applications
are presented and discussed in terms
of theoretical predictions and
experimental results.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Laser and Photonics Research Seminar:
Speaker: | Dr. Charles M. Bowden |
| Research Development and Engineering Center of
U.S. Army Missile Command, Redstone Arsenal, Alabama |
Date: | Friday, August 30, 1996 |
Time: | 3:30 PM |
Place: | NRC 108 |
Title: | Coherent Coulomb Exchange
Effects and Ultra-Fast Phenomena in Semiconductors |
Oklahoma State Physics Department
Seminars and Colloquia, September 2-6, 1996
Undergraduate Physics Journal Club:
Speaker: | Dr. Peter Shull |
| Department of Physics (OSU) |
Date: | Wednesday, September 4, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | The Nature of Space and Time |
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Jacques H.H. Perk |
| Department of Physics (OSU) |
Date: | Friday, September 6, 1996 |
Time: | 1:30 PM |
Place: | PS 147 |
Title: | Aspects of the Chiral Potts Model |
Oklahoma State Physics Department
Seminars and Colloquia, September 9-13, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Jerzy Krasinski |
| Dept. of Electrical Engineering &
Center for Laser & Photonics Research (OSU) |
Date: | Monday, September 9, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Femtosecond Pulse Group Distortion
Resulting from Propagation through Various Systems |
Physics Colloquium:
Speaker: | Dr. Rueven Chen |
| School of Physics and Astronomy,
Faculty of Exact Sciences, Tel-Aviv University, Israel |
Date: | Thursday, September 12, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Nonlinearities in the Dose
Dependence of Thermoluminescence |
Abstract:
Thermoluminescence (TL) is the emission
of light from a sample, following an
appropriate excitation, and during its
heating. TL is utilized for dosimetry
by evaluating the dose imparted to the
sample. For this, a linear dependence
of the TL intensity on the dose is
desirable. However, at high doses, the
sample always approaches saturation,
which is a sublinear dependence on the
dose. From the physics point of view,
a more interesting effect is the
superlinear dependence of TL intensity
on the dose. A number of examples will
be shown, and the possible theoretical
explanation will be given. This has do
with competition with non-radiative
levels which may take place during the
excitation of the sample, during the
heating, and sometimes during both
stages. The equations governing the
processes during the excitation and
heating stages will be presented
(the latter bear some resemblance to
those governing the DTA and
Thermogravimetry phenomena).
The equations cannot be solved
analytically, however, and
conclusions can be drawn by either
approximations or by numerical
calculations. Comparison is made with
different kinds of superlinearity
observed in different materials.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Larry Scott |
| Department of Physics (OSU) |
Date: | Friday, September 13, 1996 |
Time: | 1:15 PM |
Place: | PS 147 |
Title: | Numerical Simulation of
Biomembranes |
Laser and Photonics Research Seminar:
Speaker: | Dr. Roger Frech |
| Department of Chemistry
& Biochemistry University of Oklahoma |
Date: | Friday, September 13, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Vibrational Spectroscopic Studies
of Ion-Conducting Polymers |
Oklahoma State Physics Department
Seminars and Colloquia, September 16-20, 1996
Undergraduate Physics Journal Club:
Speaker: | Dr. Paul Westhaus |
| Department of Physics (OSU) |
Date: | Wednesday, September 18, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | Cosmic [Blackbody] Radiation |
Oklahoma State Physics Department
Seminars and Colloquia, September 23-27, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Steve Schafer |
| Department of Physics (OSU) |
Date: | Monday, September 23, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Quasi-Monte Carlo Methods for
Modeling Light Propagation in Scattering Materials |
Physics Colloquium:
Speaker: | Dr. James P. Wicksted |
| Department of Physics (OSU) |
Date: | Thursday, September 26, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Brillouin Scattering: Applications Arising from
Classical Laser Spectroscopic Technique |
Abstract:
Since the invention of the laser more than 35 years ago, Brillouin
scattering has been a very important research tool in understanding the
basic optical and acoustic properties of materials. The underlying
physics of structural phase transitions in specific ferroelectric
materials and the low temperature properties of exciton states in
direct gap (bulk) semiconductors are but two examples of its many
contributions to scientific research. In this presentation, I will
review some of the basic principles involved in Brillouin scattering
and discuss some of the research and device applications that have
arisen from the use of this classical laser spectroscopic technique.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Kyungsun Moon |
| Department of Physics & Astronomy
University of Oklahoma |
Date: | Friday, September 27, 1996 |
Time: | 1:00 PM |
Place: | PS 147 |
Title: | Transport of Quantum Hall Fluids |
Oklahoma State Physics Department
Seminars and Colloquia, September 30 - October 4, 1996
Physics Colloquium:
Speaker: | Dr. John E. Furneaux |
| Laboratory for Electronic Properties
of Materials and |
| Department of Physics & Astronomy,
University of Oklahoma |
Date: | Thursday, October 3, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | 2-D or not 2-D that is the Question |
Abstract:
For many years the existence of a Metal/Insulator transition
in 2-dimensions has been discussed and researched. In 1979 the
gang of 4 including Nobel Laureate Phil Anderson made powerful
arguments which indicate that such a transition is impossible
in a non-interacting electron system. In fact it has been
demonstrated that no phase transitions can occur in 2-D at
finite temperature. Therefore, our discovery of what appears
to be a Metal/Insulator transition in the 2-D electronic system
in Silicon MOSFETs (Metal Oxide Semiconductor Field Effect
Transistors) was particularly surprising. I will discuss the
underlying arguments due to the gang of 4, and place our
experimental results in this framework. I will then attempt
a reconciliation with the existing theories. This talk should
be accessible to all levels of students.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Not scheduled in view of Fall Break
Oklahoma State Physics Department
Seminars and Colloquia, October 7-11, 1996
Undergraduate Physics Journal Club:
Speaker: | Dr. Al Rosenberger |
| Department of Physics (OSU) |
Date: | Wednesday, October 9, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | Solitary Waves |
No Colloquium scheduled in view of Fall Break
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Cary F. Chabalowski |
| Theoretical Chemist, U.S. Army Research Laboratory |
| Aberdeen Proving Ground, Maryland |
Date: | Friday, October 11, 1996 |
Time: | 1:00 PM |
Place: | PS 147 |
Title: | Theoretical Predictions of Molecular Properties
Through Quantum Mechanics: |
| The Role of Potential Energy Surfaces in
Understanding Reaction Mechanisms |
Oklahoma State Physics Department
Seminars and Colloquia, October 14-18, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Hans Bilger |
| Department of Electrical and Computer Engineering |
| Oklahoma State University |
Date: | Monday, October 14, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Ring Lasers |
Physics Colloquium:
Speaker: | Dr. Mei-mei Tidrow |
| US Army Research Lab, Fort Monmouth, New Jersey |
Date: | Thursday, October 17, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | State-of-the-art
Quantum Well Infrared Photodetectors |
Abstract:
Quantum well infrared photodetectors (QWIP) is one kind of infrared
(IR) detectors which have been developed very rapidly during the past
ten years. It takes advantages of the band gap engineering and maturity
of the III-V semiconductor material growth and processing. Compared
with other infrared technology, QWIPs have the advantages over others
by its large uniform focal plane arrays, low noise equivalent
temperature difference, high resolution, high production yield, high
speed, low cost and low power consumption. It also offers multicolor
detection capabilities which is very critical to certain applications
for target discrimination. The basic understanding of the device
physics and the state-of-the-art of the QWIP field will be presented
in the talk. Simple theoretical calculations, device design rules and
some experimental results will be given. The applications of QWIPs
will be discussed. A tape of IR imaging using 256x256 and 640x480 QWIP
array will be shown.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Not scheduled in view of Lab Manager interviews.
Oklahoma State Physics Department
Seminars and Colloquia, October 21-25, 1996
Undergraduate Physics Journal Club:
Speaker: | Dr. Xincheng Xie |
| Department of Physics (OSU) |
Date: | Wednesday, October 23, 1996 |
Time: | 3:30 PM-5:00 PM |
Place: | PS 108 (Note change of room!) |
Title: | Probing High-Temperature Superconductivity |
Abstract:
Recent experiments exploiting subtle quantum effects yield important
clues about why some ceramics conduct electricity without resistance.
Physics Colloquium:
Speaker: | Dr. Mark Samuel |
| Department of Physics (OSU) |
Date: | Thursday, October 24, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | GOING TO HIGHER ORDER: |
| THE HARD WAY AND THE EASY WAY - |
| THE AGONY AND THE ECSTASY |
Abstract:
Series arise in a wide class of calculations in mathematics,
statistical physics, condensed matter physics, and perturbative
quantum field theory. A method for estimating higher order terms
in series, as well a the sums of series, will be presented. The
method makes use of Padé Approximants. An introduction to
series and Padé Approximants will be given.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Oklahoma State Physics Department
Seminars and Colloquia, October 28 - November 1, 1996
The HG Wells and Orson Welles Memorial
Physics Colloquium:
Speaker: | Dr. Bill Cochran |
| Department of Astronomy |
| University of Texas at Austin |
Date: | Thursday, October 31, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Other Worlds: |
| The Detection of Extra-Solar Planetary Systems |
Abstract:
This past year has witnessed the discovery of a number of possible
planetary systems around other nearby sunlike stars. While we
have always thought that planet formation should be a natural result
of the process of star formation, none of the systems detected so far
bears much similarity to our own solar system. The wonderful diversity
of these newly discovered systems will provide us with new clues to the
physics of star and planet formation.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Helen Au-Yang |
| Department of Physics, OSU |
Date: | Friday, November 1, 1996 |
Time: | 1:00 PM |
Place: | PS 147 |
Title: | Differential Padé Approximants |
Oklahoma State Physics Department
Seminars and Colloquia, November 4-8, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Dale Teeters |
| Department of Chemistry |
| The University of Tulsa |
Date: | Monday, November 4, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Polymer Electrolyte Systems |
Undergraduate Physics Journal Club:
Speaker: | Dr. Penger Tong |
| Department of Physics (OSU) |
Date: | Wednesday, November 6, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | Complex Fluids: Science & Technology |
Abstract:
Fluids containing polyatomic structures manifest a wide
variety of mechanical responses, and they can exhibit numerous
forms of self-organization.
(Reading material: Physics Today, July 1990, pp. 21 ff.)
Physics Colloquium:
Speaker: | Mr. Woody Wood |
| Systems Manager, OKC Manufacturing,
Xerox Corporation |
Date: | Thursday, November 7, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Physics & Business: A Personal View |
Abstract:
Physics and business is a powerful blend. I will first relate
the personal and professional benefits of a physics degree, and
then describe Xerox, one of the world's leading high-tech firms.
I will discuss the corporation itself (history, manufacturing,
multinational market, and corporate philosophy), present-day
career opportunities in manufacturing and research, and future
employment prospects (marketability, earnings, and demand).
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Jacques H.H. Perk |
| Department of Physics, OSU |
Date: | Friday, November 8, 1996 |
Time: | 1:00 PM |
Place: | PS 147 |
Title: | Singularity Theory,
a.k.a. Catastrophe Theory |
Oklahoma State Physics Department
Seminars and Colloquia, November 11-15, 1996
Physics Colloquium:
Speaker: | Dr. Leo Hollberg |
| National Institute of Standards and Technology,
Boulder, CO |
Date: | Thursday, November 14, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Coherence Effects, Lasing without
Population Inversion and Other Spectroscopy with Diode Lasers |
Abstract:
Coherent optical fields can be used with multi-level atoms to explore
surprising, nonintuitive effects such as electromagnetic-induced
transparency, dark line resonances, and lasing without population
inversion. Many of these unusual effects predicted theoretically have
now been observed in the laboratory. When optical coherences dominate
the atom-field interaction our physical intuition becomes less useful in
predicting the macroscopic response of the system. Simplified
theoretical models can sometimes provide a "physical picture" of these
effects. Fortunately simple experimental systems can often be used to
test the theoretical predictions. Progress and limitations in
experiments on LWI and other coherence effects will be discussed.
Experimental progress in this and other fields of spectroscopy has
resulted in-part from recent advances in the technology of semiconductor
diode lasers and nonlinear optics. The state-of-the-art of these
"modern" tools of precision measurements will be briefly outlined. We are
now using these lasers to reach wavelengths that range from 200 nm in the
UV to 300 microns in the far-infrared, for experiments that range from
tests of fundamental physics to applications in applied molecular
spectroscopy.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Journal Club on Statistical Mechanics
and Condensed Matter Physics (Informal):
Speaker: | Dr. Wei Shan |
| Department of Physics, OSU |
Date: | Friday, November 15, 1996 |
Time: | 1:00 PM |
Place: | PS 147 |
Title: | Excitons in GaN |
Oklahoma State Physics Department
Seminars and Colloquia, November 18-22, 1996
Undergraduate Physics Journal Club:
Speaker: | Dr. Paul Westhaus |
| Department of Physics (OSU) |
Date: | Wednesday, November 20, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | The Classical Limit of an Atom |
Abstract:
By creating ultralarge atoms, physicists hope to study how the odd
physics of the quantum world becomes the classical mechanics of everyday
experience. (Reading material: Scientific American, June 1994, by
Michael Nauenberg, Carlos Stroud and John Yeazell).
Physics Colloquium:
Speaker: | Dr. Mike Clark |
| Department of Physics (OSU) |
Date: | Thursday, November 21, 1996 |
Time: | 4:00 PM |
Place: | PS 110 |
Title: | Six and a Half Years in ________:
Reflections on Graduate School and Science
|
Abstract:
Looking back over the past six and one half years at OSU,
I will present my perceptions of graduate study in physics.
Topics to be covered include course work, prelims, research,
and my dissertation. As my graduate study progressed, my concept
of what 'science' is and its importance to society has
changed dramatically. This evolution in my perception of
science will also be presented.
Note:
The traditional student-speaker chat will
begin in Physical Sciences Room 147
at 3:30 p.m. All students are welcome!
Refreshments will be served.
Oklahoma State Physics Department
Seminars and Colloquia, November 25-29, 1996
Laser and Photonics Research Seminar:
Speaker: | Dr. Robert J. Hauenstein |
| Department of Physics |
| Oklahoma State University |
Date: | Monday, November 21, 1996 |
Time: | 4:00 PM |
Place: | NRC 108 |
Title: | Anion-Exchange Reactions and Initial
GaN Formation on GaAs (100) using a Nitrogen Plasma |
Thanksgiving
Oklahoma State Physics Department
Seminars and Colloquia, December 2-6, 1996
Undergraduate Physics Journal Club:
Speaker: | Dr. S.W.S. McKeever |
| Department of Physics (OSU) |
Date: | Wednesday, December 4, 1996 |
Time: | 3:30 PM |
Place: | PS 147 |
Title: | What should we do with radioactive waste? |
Abstract:
We will discuss issues relevant to the disposal and storage of
radioactive waste in the US. Topics to be discussed will include some
basic aspects of radiation dosimetry, health effects, storage sites in
the US, dose levels, etc. Students are required to have searched for
literature sources on this issue to bring to the meeting for discussion.
The discussion will be led by Steve McKeever and Art Lucas.
Prefinals Week
Oklahoma State Physics Department
Seminars and Colloquia, December 9-16, 1996
Finals Week
Last Updated: 4 November, 1996.
This page was prepared by Helen Au-Yang and Jacques H.H. Perk.
jhhp@jperk.phy.okstate.edu