# Stephen W. Teitsworth

## Associate Professor of Physics

### Overview

Prof. Stephen W. Teitsworth's research centers on experimental, computational, and theoretical studies of deterministic and stochastic nonlinear electronic transport in nanoscale systems. Three particular areas of current interest are: 1) stochastic nonlinear electronic transport phenomena in semiconductor superlattices and tunnel diode arrays; 2) complex bifurcations associated with the deterministic dynamics of electronic transport in negative differential resistance systems; and 3) strategies for stabilizing negative differential resistance systems against the formation of space-charge waves.

### Selected Grants

Switching Dynamics of Electric Field Domains in Semiconductor Superlattices awarded by National Science Foundation (Principal Investigator). 2008 to 2012

DHB: Niches and Networks: Studying the Coevolution of Voluntary Groups and Social Networks awarded by National Science Foundation (Co-Principal Investigator). 2005 to 2007

Development of Novel Photonic Nanostructures for Measurement in the Duke Femtosecond Terahertz Diagnostic Laboratory awarded by Lord Foundation of North Carolina (Principal Investigator). 2002 to 2005

Duke Terahertz Femtosecond Diagnostic Laboratory awarded by Lord Foundation of North Carolina (Principal Investigator). 1999 to 2002

Acquisition of a Variable Temperature Four-Circle X-Ray Diffraction System awarded by National Science Foundation (Co-Principal Investigator). 1999 to 2001

Optoelectronics Laboratory Equipment Enhancement awarded by Lord Foundation of North Carolina (Principal Investigator). 1998 to 1999

(94-0188) Electron-localized Phonon Interactions in GaAs/AlxGal-xAs Quantum Well Structures awarded by National Science Foundation (Principal Investigator). 1992 to 1996

(92-0416) Electron-Localized Phonon Interactions in GaAs/AlxGa,-xAs Quantum Well Structures awarded by National Science Foundation (Principal Investigator). 1992 to 1995

(93-0918) Electron-Localized Phonon Interactions in GaAs/AlxGa- xAs Quantum Well awarded by National Science Foundation (Principal Investigator). 1992 to 1995

Ghanta, A, Neu, JC, and Teitsworth, S. "Fluctuation loops in noise-driven linear dynamical systems." *Physical Review E* 95.3 (March 2017).
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Dannenberg, PH, Neu, JC, and Teitsworth, SW. "Steering most probable escape paths by varying relative noise intensities." *Physical review letters* 113.2 (July 7, 2014): 020601-.
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Bomze, Y, Hey, R, Grahn, HT, and Teitsworth, SW. "Noise-induced current switching in semiconductor superlattices: observation of nonexponential kinetics in a high-dimensional system." *Phys Rev Lett* 109.2 (July 13, 2012): 026801-.
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Bomze, Y, Hey, R, Grahn, HT, and Teitsworth, SW. "Noise-Induced Current Switching in Semiconductor Superlattices: Observation of Nonexponential Kinetics in a High-Dimensional System." *Physical Review Letters* 109.026801 (2012): 4-. (Academic Article)

Bonilla, LL, and Teitsworth, SW. "Nonlinear Wave Methods for Charge Transport." *Nonlinear Wave Methods for Charge Transport* (September 20, 2010).
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Xu, H, and Teitsworth, SW. "Emergence of current branches in a series array of negative differential resistance circuit elements." *Journal of Applied Physics* 108.4 (2010).
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Bonilla, LL, and Teitsworth, SW. "Nonlinear Wave Methods for Charge Transport." *Nonlinear Wave Methods for Charge Transport* (2010).
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Xu, H, and Teitsworth, SW. "On the possibility of a shunt-stabilized superlattice terahertz emitter." *Applied Physics Letters* 96.2 (2010).
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Heinrich, M, Dahms, T, Flunkert, V, Teitsworth, SW, and Schöll, E. "Symmetry-breaking transitions in networks of nonlinear circuit elements." *New Journal of Physics* 12 (2010).
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Xu, H, and Teitsworth, SW. "On the possibility of a shunt-stabilized superlattice THz emitter." *Applied Physics Letters* 96.022101 (2010): 3 pages-. (Academic Article)