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Summary of Philipp Kühne's activities


My work is focused on the instrumental development and application of the unique optical Hall effect (OHE) methodology (ellipsometry at high magnetic fields in the mid/far-infrared and THz spectral range). This novel, contact free, non-destructive technique allows for exploring electronic, transport and magnetic properties and phenomena in, semiconductors, nanomaterials, organic materials, which cannot be assessed by other means. I applied the mid-infrared OHE to reveal distinct polarization selection rules (polarization mixing and polarization conserving) for inter-Landau-level transitions in single and multi-layer graphene. At the University of Linköping I will develop a novel THz optical Hall effect instrument capable to conduct experiments with the sample exposed to high magnetic fields (B > 5T). Our ambition is to establish a unique center for THz and magneto-optic ellipsometry at the University of Linköping.

Selected publications & conference contributions

  • An integrated mid-infrared, far-infrared and terahertz optical Hall effect instrument
    P. Kühne, C. M. Herzinger, M. Schubert, J.A. Woollam, T. Hofmann
    Review of Scientific Instrumentation 85, 071301 (2014)      pdf available
  • Polarization Selection Rules for Inter-Landau-Level Transitions in Epitaxial Graphene Revealed by the Infrared Optical Hall Effect
    P. Kühne, V. Darakchieva, R. Yakimova, J. D. Tedesco, R. L. Myers-Ward, C. R. Eddy, Jr., D. K. Gaskill, C. M. Herzinger, J. A. Woollam, M. Schubert, and T. Hofmann
    Physical Review Letters 111, 077402 (2014)      pdf available
  • Temperature dependent effective mass in AlGaN/GaN high electron mobility transistor structures
    T. Hofmann, P. Kühne, S. Schöche, Jr-Tai Chen, U. Forsberg, E. Janzén, N. Ben Sedrine, C. M. Herzinger, J. A. Woollam, M. Schubert and V. Darakchieva
    Applied Physics Letters 101, 192102 (2012)      pdf avilable
Free charge carrier response (FCC) and inter Landau-level transitions in multi-layer (LLBLG) and single-layer grapheme (LLSLG).
Philipp Kühne


Host: Vanya Darakchieva


E-mail: kuehne@ifm.liu.se
Phone: +46 (0)13 28 25 63
             +46 (0)70 08 95 764

Room G217 (Physics Building)

Semiconductor Materials, IFM
Linköping University
Linköping, Sweden


Responsible for this page: Fredrik Karlsson
Last updated: 09/04/14