Back to our workgroup / our institute.

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Stefan Hoffmann IC2 / 156 Tel.: +49 - (0)234 - 32 - 26514 Fax: +49 - (0)234 - 32 - 14166 e-mail: Stefan.Hoffmann@ruhr-uni-bochum.DE Workgroup Materials of Microelectronics Materials of Electrical Engineering University of Bochum

Research-Areas:

• Four-Wave Mixing
• THz-Generation and Spectroscopy
• THz-Imaging
• Fourier Transform External Cavity Laserdiode (FTECAL)
• Ultashort Pulse Generation

Publications:

• S. Hoffmann, M. Hofmann, E. Bründermann and M. Havenith, M. Matus, J.V. Moloney,
  A.S. Moskalenko, M. Kira and S.W. Koch S. Saito and K. Sakai,
  Four-wave mixing and direct terahertz emission with two-color semiconductor lasers
  Applied Physics Letters, Vol. 84, 3585, May 2004
• P. Knobloch, C. Schildknecht, T. Kleine-Ostmann, M. Koch
  S. Hoffmann, M. Hofmann, E. Rehberg, M. Sperling, K. Donhuijsen
  G. Hein and K. Pierz
  Medical THz imaging: an investigation of histo-pathological samples
  Phys. Med. Biol. Vol. 47, 3875-3884, Oct. 2002
• M. Breede, S. Hoffmann, J. Zimmermann, J. Struckmeier, M. Hofmann,
  T. Kleine-Ostmann, P. Knobloch, M. Koch, J. P. Meyn, M. Matus, S. W. Koch and J. V. Moloney
  Fourier-transform external cavity lasers
  Optics Communications, Vol. 207, 261-271, No.1-6, June 2002
• S. Hoffmann, M. Hofmann, T. Kleine-Ostmann, P. Knobloch
  and M. Koch
  Laserdioden-basierendes Terahertz-Imaging-System
  Photonik, Vol. 34, No. 2, Apr. 2002
• T. Kleine-Ostmann, P. Knobloch, M. Koch, S. Hoffmann, M. Breede
  M. Hofmann, G. Hein, K. Pierz, M. Sperling and K. Donhuijsen
  Continuous-wave THz-imaging
  Electronics Letters, Vol. 37, 1461-1463, No. 24, Nov. 2001

Conferences:

• S. Hoffmann and Martin Hofmann
  THz-Strahlungserzeugung mit Zwei-Farben Halbleiterlaser
  DPG-Frühjahrstagung, Regensburg, Mar. 2004
• S. Hoffmann and Martin Hofmann
  (invited) Two Color Semiconductor lasers
  Proceedings of SPIE, Vol. 5349, Photonics West, San Jose, Jan 2004
• S. Hoffmann and Martin Hofmann
  Vier-Wellen Mischen mit Zwei-Farben Halbleiterlaser
  DPG-Frühjahrstagung, Dresden, Mar. 2003
• T. Kleine-Ostmann, P. Knobloch, M. Koch, S. Hoffmann
  M. Hofmann, G. Hein and K. Pierz
  Compact and cost-effective continuous wave THz imaging system
  Proceedings of the Conference on Lasers and Electro-Optics 2002, Long Beach, CA, May 2002
• S. Hoffmann, M. Breede, M.Hofmann
  Spektral abstimmbarer Halbleiterlaser mit resonatorinterner Fourier-Transformation
  DPG-Frühjahrstagung, Osnabrück, Mar. 2002
• M. Breede, T. Hoener zu Siederdissen, M. Hofmann
  S. Hoffmann, J. Kovacs, J. Struckmeier, J. Zimmermann
  T. Kleine-Ostmann, P. Knobloch and M. Koch
  Semiconductor laser with simultaneous tunable dual wavelength emission
  Proceedings of SPIE, Vol. 4646, Photonics West, San Jose, Jan 2002