Physics Department
The University of Texas at Arlington
Department of Physics
• 21 Full Faculty, Two Full Time Lecturers• 52 Graduate Students (Ph.D. and MS)• 20 Senior Researchers and Post-Docs• 11 Full Time Technical and Clerical Staff
Department of Physics
B.A., Physics B.S., Physics M.S., Physics Ph.D., Physics and
Applied Physics
Degrees:
Over $6 Million per year in Federally Funded Research
Research Areas:• High Energy Physics• Astrophysics/Space Physics• Condensed Matter Experiment
• Nano-magnetic Materials• Nano-bio Materials• Nano-bio Optics• Surface Physics
• Condensed Matter Theory• Modeling of Nano-Materials• Modeling of Surfaces
Tuesday, Nov. 8, 2011 UTA Physics Department 5
High Energy Physics: Drs. Yu, De, Brant, White, Jackson, and Farbin
Geneva Airport
ATLAS
CMS
France
Swizerland
LHC @ CERN Aerial View
Tuesday, Nov. 8, 2011 UTA Physics Department
Fermilab Tevatron and LHC at CERN World’s Highest Energy proton-anti-proton collider
– 4km circumference– Ecm=1.96 TeV (=6.3x10-7J/p 13M Joules on the
area smaller than 10-4m2)– Equivalent to the kinetic energy of a 20t truck at
the speed 81mi/hr 130km/hr ~100,000 times the energy density at the ground 0 of the
Hiroshima atom bomb– Was shut down at 2pm CDT, Sept. 30, 2011
Other parts of the complex is still running!!
Chicago
Tevatron p
p CDF
DØ
• World’s Highest Energy p-p collider– 27km circumference, 100m underground– Design Ecm=14 TeV (=44x10-7J/p 362M
Joules on the area smaller than 10-6m2) Equivalent to the kinetic energy of a B727
(80tons) at the speed 193mi/hr 312km/hr ~300M times the energy density at the ground 0 of the
Hiroshima atom bomb• First 7TeV collisions on 3/30/10 The highest energy
humans ever achieved!!• Just completed a successful run this year!
6
Recent Excitement: Hint of the Higgs
UTA Physics Department 7
These red lines show how the LHC's Atlas experiment registered the arrival of four particles called muons. They could have been the byproducts of a short-lived Higgs boson--or they could have been more humdrum events. CERN's LHC particle accelerator will continue smashing protons into each other to spot the statistical significance that means the Higgs really has been found. (Credit: CERN)
Astrophysics
Search for extra-solar planets – Musielak and Cuntz X-ray telescope image of supernova - Park
Study of Supernova Remnants
~1-10 M deg hot gas: Observations using X-ray space telescopes (e.g., Chandra).
Studies of Supernova (SN) nucleosynthesis Chemical composition and Density structure of interstellar medium Cosmic-ray acceleration by SN shock Nature of neutron stars
X-ray Astronomy Supernova Remnants
Size ~17 pc ~ 57 light yearDistance ~ 6 kpc ~ 20000 light year Size ~0.3 pc ~ 1 light year
Neutron star
Tuesday, Nov. 8, 2011 9UTA Physics Department
Assist. Prof. Sangwook Park
Space Physics
Solar Wind
Magnetosphere
Ionosphere/Thermosphere
Ionosphere/Thermosphere Processes
Professor Ramon Lopez
Assist. Prof. Yue Deng
Condensed Matter Experiment– Internationally recognized in nano-magnetism, positron
physics, structure of actinides, fullerenes, photonic materials.
– Extensive funding, including multi-million dollar, multi-year DARPA and (2005 ) MURI grant awards for nano-structured magnetic materials.
Prof. Sharma Prof. Weiss Prof. Koymen
Assoc. Prof. ChenProf. Liu Assist. Prof. Mohanty
Prof. Sharma
The Smallest Permanent Magnets – Drs Liu & Koymen
-60 -40 -20 0 20 40 60-1000
-800
-600
-400
-200
0
200
400
600
800
1000
0.05 0.10 0.15 0.20 0.25
400
500
600
700
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M (
em
u/c
m3 )
H (kOe)
15 nm 8 nm 6 nm 4 nm
Ms
(em
u/cm
3 )
d-1 (nm-1)
Ferromagnetic nanoparticles (single domain and single crystal) have coercivity up to 3 Tesla!
We are able to produce world smallest permanent magnets down to 3 nm with large magnetic force!
Tuesday, Nov. 8, 2011 12UTA Physics Department
Nanodiamond and electro-optic materialsProfessor Suresh C Sharma
Diamond NPs grown by
chemical vapor deposition
Looking at diamond nanoparticles (size ~ 10-100 nm) with advanced tools of nanotechnology
Using lasers to synthesizeelectro-optic materials with sub-
micron scale periodic variations in refractive index used for advanced
optical devices
Nanotechnology For Health Care and Homeland Security – Dr. Chen
Tuesday, Nov. 8, 2011 14UTA Physics Department
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Manipulation and imaging
- Optical tweezers (disease diagnosis, force sensing)
- Laser spanner (optofluidics, neuronal guidance)
- Optical stretcher (cellular biomechanics)
- Laser scissors (nano-surgery,)- Digital holographic microscopy
(refractive index measurement)
Advanced BiophotonicsTherapeutic control
- Photothermal therapy(gene delivery, damage cancer)
- Optogenetics (vision restoration, pain inhibition)
- DNA damage-repair (aging, new pathways )
- Nerve injury-repair (screening new molecules for regeneration)
Tuesday, Nov. 8, 2011 UTA Physics Department
NEW 2-METER T-O-F SPECTROMETER
“Secondary Electron”E1
Valence Band
E AMQS = E1 - E2 - φ-
Virtual photon
Scattering state
Surface state
E2
Vacuum Level
φ-
Direct trapping in the surface state potential well
Incident positrons
φ+
Surface potential
Metal Vacuum
Energy available to an electron at fermi level
(a) (b)
Vacuum Level
Figure1.Schematics of AMQS process a,b, (a)The slow positrons may be directly trapped in the surface state resulting in the release of an electron with the residual energy (b) the energy band diagram showing the Auger like transition where the incident positron drops down to fill an empty state while simultaneously kicking out a secondary electron.
Condensed Matter Theory
Modeled Nano-structures
Positron trapped at Si 7x7 surface
Theory prediction of new double walled SiC nanostructures
Materials discovery “by design”Application of Electronic Structure Theory to Materials in Renewable Energy
Complex quantum mechanical calculations to understand the Physics of materials.
Research Topics:1. Materials discovery for Renewable Energy technology.2. Nano-structures for future electronics and nano-technology.3. Physics for flexible electronics, which can be folded or deformed like paper.
e f g
Flexible Detectors on ROIC
3D Detectors
e f g
Flexible Detectors on ROIC
3D Detectors
PV-cell Nano-structures Flexible nano-structures.
Research are done in collaboration of National Renewable Energy Laboratory.
Assist. Prof. Huda
The People of the UTA Physics Department Welcome You!