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Gregory von Winckel
Contact
Information

Heinrichstraße 36
Institut f¨
ur Mathematik und
Wissenschafliches Rechnen
Karl-Franzens Universit¨
at
A-8010 Graz, Austria

Voice: + 43 316 380 5166
Fax: + 43 316 380 9815
Skype: gvonwin
E-mail: gregory.von-winckel@uni-graz.at
Homepage: http://www.uni-graz.at/ vonwinck/

Personal data

Date and place of birth: June 10, 1974, Hartford, Connecticut, United States
Marital status: Married
Citizenship: United States

Career
objectives

To be part of an interdisciplinary research and development team which advances the technological
state of the art. An ideal position would make use of both electrical engineering and applied
mathematics expertise.

Current
Research
Focus

PDE-constrained optimization, numerical analysis, control of quantum systems, optimal control with
uncertainty, scientific computing with Python and on graphics processing units.

Technical
Skills

Matlab, Maple, LATEX, C++, Python, Linux, Max OS X, Windows

Work
Experience

Assistant professor
July, 2011 - present
Karl-Franzens Universit¨
at, Graz, Austria
Conducted research in simulation and control of multiparticle systems. Taught graduate courses in
numerical optimization, partial differential equations, and numerical analysis.
Postdoctoral researcher
January, 2007 - June, 2011
Karl-Franzens Universit¨
at, Graz, Austria
Developed fast and efficient methods for quantum control and parallel magnetic resonance image
reconstruction. Taught undergraduate and graduated courses in numerical partial differential equations and Krylov methods. Coauthored proposal for major research grant extension. Coordinated
ENUMATH 2007 scientific conference.
Graduate Intern
July, 2006 - December, 2006
Sandia National Laboratory, Albuquerque, New Mexico, USA
Worked on numerical modeling and analysis of nonlinear gas chromatography.
Graduate Assistant
September 2005 - May, 2006
University of New Mexico, Albuquerque, New Mexico, USA
Responsibilities have been grading and conducting recitation hours for the course Introduction to
Numerical Computing.
Research Assistant
July 2002 - August, 2005
University of New Mexico - Center for High Technology Materials, Albuquerque, New Mexico, USA
Research areas have included molecular beam epitaxy growth of quantum dot infrared photodetectors
and computation of quantum dot electronic states and photoabsorption.
Hardware and Software Engineer
October, 2001 - June, 2002
Thunder Scientific Corp., Albuquerque, New Mexico, USA
Work included design of high-precision humidity calibration systems and performing uncertainty
analysis of humidity measurements.

Software Engineer
May, 2000 - April, 2001
Virtual Ink Corp., Boston, Massachusetts, USA
Wrote infrared and ultrasound data filtering algorithms and diagnostic routines for the mimio whiteboard data capture device.
Teaching Assistant
September, 1998 - January, 2000
University of Connecticut, Storrs, Connecticut, USA
Taught three undergraduate electronics laboratory courses on the use of oscilloscopes, function
generators, amplifier and oscillator circuit design.
Education

Ph.D., Applied Mathematics
University of New Mexico, Albuquerque, New Mexico USA
Dissertation Topic: Optimal Control Techniques in Quantum Mechanics.
Advisor: Evangelos A. Coutsias

December, 2011

Ph.D., Electrical and Computer Engineering, Opto-electronics
April, 2006.
University of New Mexico, Albuquerque, New Mexico USA
Dissertation Topic: Electronic Structure and Photon Absorption in Semiconductor Quantum Dots.
Advisor: Sanjay Krishna

M.S., Electrical and Computer Engineering
B.S.E., Electrical and Systems Engineering
University of Connecticut, Storrs, Connecticut USA

Honors and
Awards

August, 2000
May, 1998

University of New Mexico: Passed Mathematics Ph.D. examination with distinction. February, 2011
University of New Mexico: Passed Engineering Ph.D. examination with distinction. April, 2006
Received NASA Epscor Grant for to work as a research assistant at NASA Langley Research Center,
Hampton, Virginia. Worked on developing a deep-level transient spectroscopy system for characterizing laser-annealed thin film transistors. Spring, 2000
University of Connecticut: graduated Cum Laude, Tau Beta Pi, Eta Kappa Nu, 1996

Courses Taught

Winter
Summer

2011
2011

Winter
Summer
Winter

2010
2010
2009

Summer

2009

Winter
Spring
Fall
Fall
Spring
Fall

2008/09
2006
2005
1999
1999
1998

Numerical Mathematics II
Partial Differential Equations
Optimization II
Numerical Partial Differential Equations
Numerical Mathematics I
Linear Algebra I
Higher Mathematics III
Programming
Introduction to Numerical Mathematics
Interaktives Mathematisches Paket
Introduction to Numerical Computing
Introduction to Numerical Computing
Electrical Engineering Laboratory A
Electrical Engineering Laboratory B
Electrical Engineering Laboratory A

Publications

G. von Winckel and A. Borz`ı, Optimal control of a diatomic molecule, submitted to Numerical
Linear Algebra with Applications, January (2012)
S. Keeling, C. Clason, M. Hinterm¨
uller, F. Knoll, A. Laurain, and G. von Winckel, An image space
approach to Cartesian based parallel MR imaging with total variation regularization, Medical Image
Analysis 16 (2012), 189-200.
A. Borz`ı and G. von Winckel, A POD framework to determine robust controls in PDE optimization,
Computing and Visualization in Science, 14 (2011), 91-103.
C. Clason and G. von Winckel, A general spectral method for the numerical simulation of onedimensional interacting fermions, Computer Physics Communications 183 (2011), 405-417.
G. von Winckel and A. Borz`ı, QUCON: A fast Krylov-Newton code for dipole quantum control
problems, Computer Physics Communications, 181, (2010), 2158-2163.
A. Borz`ı, V. Schulz, C. Schillings, and G. von Winckel, On the treatment of distributed uncertainties
in PDE constrained optimization, GAMM Mitteilungen, 33, (2010), 230-246.
C. Clason, G. von Winckel, On a bilinear optimization problem in parallel magnetic resonance
imaging, Applied Mathematics and Computation, 216, (2010), 1443-1452.
J. Grond, G. von Winckel, J. Schmiedmayer, and U. Hohenester: Optimal control of number squeezing in trapped Bose-Einstein condensates, Physical Review A 80 (5) (2009), 053625. Selected for
republication in Virtual Journal of Atomic Quantum Fluids, 1, (6), (2009)
G. von Winckel, A. Borz`ı, and S. Volkwein, A globalized Newton method for the accurate solution of
a dipole quantum control problem, SIAM Journal of Scientific Computing, 31 (6), (2009), 4176-4203.
A. Borz`ı, and G. von Winckel, Multigrid methods and sparse-grid collocation techniques for parabolic
optimal control problems with random input data., SIAM Journal of Scientific Computing, 31,
(2009), 2172-2192
G. von Winckel, and A. Borz`ı, Computational techniques for a quantum control problem with H 1 cost, Inverse Problems, 24, 034007 (2008)
A.B. Weerasekara, M.B.M. Rinzan, R.C. Jayasinghe, S.G. Matsik, A.G.U. Perera, M. Buchanan,
H.C. Liu, G. von Winckel, A. Stintz, and S. Krishna, Single and Multi Emitter Terahertz Detectors
Using n-Type GaAs/AlGaAs Heterostructures, Sensors, October (2007), 507-510
A.B. Weerasekara, M.B.M. Rinzan, S.G. Matsik, A.G.U. Perera, M. Buchanan, H.C. Liu, G. von
Winckel, A. Stintz and S. Krishna, Si doped GaAs/AlGaAs terahertz detector and phonon effect on
the responsivity, Infrared Physics & Technology, 50, (2-3), 194-198 (2007)
A.B. Weerasekara, M.B.M. Rinzan, S.G. Matsik, A.G.U. Perera, M. Buchanan, H.C. Liu, G. von
Winckel, A. Stintz and S. Krishna, n-Type GaAs/AlGaAs heterostructure detector with a 3.2 THz
threshold frequency, Optics Letters, 32, 10 (2007), 1335-1337
G. von Winckel, S. Krishna, E. A. Coutsias, Spectral Element Modeling of Semiconductor Heterostructures, Mathematical and Computer Modelling, 43 (5-6), (2006), 542-591
A. G. U. Perera, S. G. Matsik, P. V. V. Jayaweera, K. Tennakone, H. C. Liu, M. Buchanan, G. von
Winckel, A. Stintz, and S. Krishna, High operating temperature split-off band infrared detectors,
Applied Physics Letters, 89, 131118, (2006)

M.B.M. Rinzan, A.G.U. Perera, S.G. Matsik, H.C. Liu, M. Buchanan, G. von Winckel, A. Stintz
and S. Krishna, Terahertz absorption in AlGaAs films and detection using heterojunctions, Infrared
Physics and Technology, 47, 1-2, (2005), 188-194
S. G., Matsik, M.B.M. Rinzan, D.G. Esaev, A.G.U. Perera, G. von Winckel. A. Stintz, S. Krishna,
H.C. Liu, M. D. Byloos, T. Oogarah, G.I. Sproule, K. Liu, and M. Buchanan, Effect of doped
substrate on GaAs-AlGaAs interfacial workfunction IR detector response through cavity effect, IEEE
Transactions on Electron Devices, 52,3, (2005), 413-418
A.G.U. Perera, M.B.M. Rinzan, S.G. Matsik, H.C. Liu, M. Buchanan, G. von Winckel, A. Stintz,
and S. Krishna, Terahertz absorption in AlGaAs films and detection using heterojunctions, Infrared
Physics & Technology, 47, (1-2), 188-94 (2005)
G. Ariyawansa, A. G. U. Perera, S. Raghavan, G. von Winckel, A. Stintz, S, Krishna, Effect of well
width on three-color quantum dots-in-a-well infrared detectors, IEEE Photonics Technology Letters,
17, (5), (2005), 1064-1066
Z. G. Hu, M. B. M. Rizan, S. G. Matsik, A. G. U. Perera, G. von Winckel, A. Stintz, S. Krishna,
Optical characterizations of heavily doped p-type Alx Ga1−x As and GaAs epitaxial films at terahertz
frequencies, Journal of Applied Physics, 97, (2005), 93529-1-7
S. Raghavan, D. Forman, P. Hill, N. R. Weisse-Bernstein, G. von Winckel, P. Rotella, S. Krishna, S.
W. Kennerly, J. W. Little, Normal-incidence InAs/In0.15 Ga0.85 As quantum dots-in-a-well detector
operating in the long-wave infrared atmospheric window (8 - 12 µ m), Journal of Applied Physics,
96, (2004), 1036
P. Rotella, G. von Winckel, S. Raghavan, A. Stintz, Y. Jiang, S. Krishna, Study of structural
and optical properties of quantum dots-in-a-well heterostructures, Journal of Vacuum Science and
Technology B, 22, (2004), 1512
M.B.M Rinzan, D.G Esaev, A.G.U Perera, S.G. Matsik, G. von Winckel, A. Stintz, and S. Krishna,
Free carrier absorption in Be-doped epitaxial AlGaAs thin films, Applied Physics Letters, 85, (2004),
5236
A. Amtout, S. Raghavan, P. Rotella, G. von Winckel, A. Stintz, S. Krishna, Theoretical modeling
and experimental characterization of InAs/InGaAs quantum dots in a well detector, Journal of
Applied Physics 96, 3782-6 (2004)
S. Krishna, S. Raghavan, G. von Winckel, A. Stintz, G. Ariyawansa, S. G. Matsik, A.G.U. Perera,
Three-color ( λp1 ∼ 3.8µm, λp2 ∼ 8.5µm, and λp3 ∼ 23.2µm) InAs/InGaAs quantum-dots-in-a-well
detector, Applied Physics Letters, 83, (2003), 2745
S. Krishna, S. Raghavan, G. von Winckel, P. Rotella, A. Stintz, C.P. Morath, D. Le, S.W. Kennerly, Two color InAs/InGaAs dots-in-a-well detector with background-limited performance at 91
K, Applied Physics Letters 82, (2003), 2574

Conferences

G. von Winckel, A globalized Newton method for the optimal control of multiple interacting fermions,
25th IFIP TC Conference on System Modeling and Optimization, Technische Universit¨
at Berlin,
September (2011)
G. von Winckel, A Newton method for the solution of a dipole quantum control problem with uncertain potential, 14th Belgian-French-German Conference on Optimization, Katholische Universit¨
at

owen, Belgien, September (2009)
G. von Winckel, An inexact Newton method for optimal control of quantum state transitions, Statusseminar des SFB F032, Admont, Austria, November (2008)
G. von Winckel, A function-space BFGS method of optimal control of a quantum system First
Slovak-Austrian Mathematical Congress, Podbanske, Slovakia, September (2007)
G. von Winckel, An L-BFGS Method in H1 for optimal control of a quantum system, ENUMATH
2007, Graz, Austria, September (2007)
G. von Winckel, E. A. Coutsias, S. Krishna, Spectral element solutions of the Schr¨odinger equation
in unbounded domains, International conference for Spectral and High Order Methods, Providence,
Rhode Island, June (2004)
R. P. Prasankumar, R. D. Averitt, A. J. Taylor, G. von Winckel, A. Stintz, S. Krishna, Time-resolved
mid-infrared dynamics of an InAs/InGaAs quantum-dots-in-a-well detector, International Quantum
Electronics Conference, (2004)
G. von Winckel, E. Coutsias and S. Krishna, The Helmholtz eigenproblem in elliptical domains using
spectral tau-Method and conformal mapping, International Conference on Spectral and High Order
Methods, Providence, RI June (2004)
S. Raghavan, D. Forman, P. Hill, G. von Winckel, A. Stintz, S. Krishna, Normal incidence InAs/InGaAs
quantum dots-in-a-well photodetector spanning the 8-12 mu m atmospheric window, 2003 IEEE/LEOS
Annual Meeting Conference Proceedings. pt. 2, 2 921-2 (2003)
A. Amtout, S. Raghavan, P. Rotella, G. von Winckel, A. Stintz, S. Krishna, Theoretical modeling
and experimental characterization of InAs/InGaAs dots in a well detector, 2003 IEEE/LEOS Annual
Meeting Conference Proceedings. pt. 2, 2 923-4 (2003)
S. Raghavan, G. von Winckel, P. Rotella, A. Stintz, S. Krishna, Control of operating wavelength and
linewidth in LWIR InAs/InGaAs dots-in-a-well detectors, 61st Device Research Conference (2003)
S. Krishna, S. Raghavan, G. von Winckel, A. Stintz, G. Ariyawansa, S. G. Matsik, A.G.U. Perera, Three-color InAs/InGaAs quantum dots-in-a-well infrared photodetectors, IEEE International
Symposium on Compound Semiconductors (2003)
G. von Winckel, S. Krishna, theoretical model for bias dependent shift of absorption spectra in quantum well infrared photodetectors, IEEE /LEOS Annual Meeting Conference Proceedings., Glasgow,
U.K. October (2002)


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