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Publications 2012

  • F. Römer and B. Witzigmann: Modeling surface effects in nano wire optoelectronic devices. J. Comput. Electron. vol. 11, no. 4, pp. 431-439, Nov. 2012.
  • M. Deppner, F. Roemer, and B. Witzigmann, Auger carrier leakage in III-nitride quantum-well light emitting diodes, PHYSICA STATUS SOLIDI (RRL), vol. 6, issue 11, Nov. 2012, pg 418-420.

  • Shuqing Yu, Friedhard Roemer, Bernd Witzigmann:
    Analysis of surface recombination in nanowire array solar cells . SPIE Journal of Photonics for Energy, vol. 2, no. 1, p. 028002, Sep. 2012.
  • C. Kölper, M. Sabathil, M. Mandl, M. Strassburg, and B. Witzigmann:
    All-InGaN Phosphorless White Light Emitting Diodes: An Efficiency
    J. Light. Technol. vol. 30, no. 17, pp. 2853-2862, Sep. 2012.
  • Christopher Kölper, Matthias Sabathil, Friedhard Römer, Martin Mandl, Martin Strassburg, and Bernd Witzigmann:
    Core-Shell InGaN Nanorod Light Emitting Diodes: Electronic and Optical Device Properties.
    Phys. Stat. Sol. A, 1-9, 2012.
  • D. Dolgos, A. Schenk, and B. Witzigmann:
    Impact ionization scattering model based on the random-k approximation for GaAs, InP, InAlAs, and InGaAs.
    J. Appl. Phys. 111, 073714 (2012).
  • D. Dolgos, H. Meier, A. Schenk, and B. Witzigmann:
    Full-band Monte Carlo simulation of high-energy carrier transport in single photon avalanche diodes with multiplication layers made of InP, InAlAs, and GaAs.
    J. Appl. Phys. 111, 104508 (2012).
  • U. Akcakoca, B. Witzigmann, R. Zamora, T. Kusserow, and H. Hillmer:
    Frequency domain analysis of modes in a photonic crystal micro-opto-electro-mechanical system with periodically arranged circular holes.
    Optical and Quantum electronics, Vol. 44, No. 3-5, 273-277, 2012.
  • S. Yu, J. Kupec, and B. Witzigmann:
    EfficiencyAnalysis of III-V Axial and Core-Shell Nanowire Solar Cells.
    Journal of Computational and Theoretical Nanoscience, vol. 9, pg. 1-8, 2012.
  • Z. Andreev, F. Roemer, and B. Witzigmann:
    Simulation of InGaN Quantum well LEDs with reduced internal polarization.
    Phys. Status Solidi A, 209: 487-490, 2012.
  • J. Kupec, B. Witzigmann:
    Computational electromagnetics for nanostructured solar cells.
    J. Comp. El., 2012, J Comp Electron (2012) 11:153-165 (Invited Paper).
  • Shuqing Yu , Friedhard Roemer, Bernd Witzigmann:
    Analysis of surface recombination in nanowire array solar cells.
    SPIE Photonics Europe, 2012, Brussels, Europe (Best Student Paper Award).
  • F. Roemer, M. Deppner, Z. Andreev, C. Koelper, M. Sabathil, M. Straßburg, J. Ledig, S. Li, A. Waag, and B. Witzigmann:
    Luminescence and Efficiency Optimization of InGaN/GaN Core-Shell Nanowire LEDs by Numerical Modeling.
    SPIE Photonics West conference, 2012, San Francisco, US.
  • M. Deppner, M. Bjelica, F. Roemer, and B. Witzigmann:
    Computational study of multi-color InGaN/GaN nanowire LEDs with continuously varied indium composition.
    SPIE Photonics West conference, 2012, San Francisco, US.
  • B. Witzigmann, S. Yu, and J, Kupec:
    Semiconductor Nanowire Solar Cells: High Efficiency Concepts.
    SPIE Photonics West conference, 2012, San Francisco, US.
  • B. Witzigmann, M. Deppner, F. Roemer:
    GaN Nanorod LEDs: A Performance Assessment.
    IEEE NUSOD Conference, 2012, Shanghai, China (Invited Talk).
  • B. Witzigmann, S. Yu, F. Roemer, M. Deppner:
    Nanowire Arrays for Photovoltaics and Lighting: Electronic and Optical Properties.
    OSA IPR Conference, 2012, Colorado Springs, US (Invited Talk).
  • Imad Dahhan, Yohan Barbarin, Martin Hoffmann, Wolfgang Pallmann, Christian Zaugg, Matthias Golling, Thomas Suedmeyer and Ursula Keller, Bernd Witzigmann:
    Current confinement in EP-VECSELs for high power single-mode operation suitable for passive mode-locking.
    SPIE Photonics Europe, Brussels, 2012 (Invited Talk).