• Lock-on physics in semi-insulating GaAs: Combination of trap-to-band impact ionization, moving electric fields and photon recycling 

  Chowdhury, A.R.; Dickens, J.C.; Neuber, A.A.; Ness, R.; Joshi, R.P. (AIP, 2018)

  The time-dependent photoconductive current response of semi-insulating GaAs is probed based on one-dimensional simulations, with a focus on the lock-on phenomenon. Our results capture most of the experimental observations. ...

• Dynamic analysis of material ejection from cathodic metal nano-tips due to local heating and field generated stress 

  Qiu, X.; Joshi, R.P. (AIP, 2018)

  The potential for explosive cathode emission due to nanoprotrusions subjected to Maxwell stress and heating from strong electric fields is probed self-consistently based on non-equilibrium molecular-dynamics. The focus is ...

• Effect of Thermal Gradients Created by Electromagnetic Fields on Cell-Membrane Electroporation Probed by Molecular-Dynamics Simulations 

  Song, J.; Garner, A.L.; Joshi, R.P. (American Physical Society, 2017)

  The use of nanosecond-duration-pulsed voltages with high-intensity electric fields (∼100 kV/cm) is a promising development with many biomedical applications. Electroporation occurs in this regime, and has been attributed ...

• Particle-in-cell based parameter study of 12-cavity, 12-cathode rising-sun relativistic magnetrons for improved performance 

  Majzoobi, A.; Joshi, R.P.; Neuber, A.A.; Dickens, J.C. (AIP, 2015)

  Particle-in-cell simulations are performed to analyze the efficiency, output power and leakage currents in a 12-Cavity, 12-Cathode rising-sun magnetron with diffraction output (MDO). The central goal is to conduct a parameter ...

• Asymmetric conduction in biological nanopores created by high-intensity, nanosecond pulsing: Inference on internal charge lining the membrane based on a model study 

  Joshi, R.P.; Qiu, H. (AIP, 2015)

  Nanosecond, high-intensity electric pulses have been reported to open rectifying pores in biological cell membranes. The present goal is to qualitatively understand and analyze the experimental current-voltage (I-V) data. ...

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