Khaled Karrai

Rudolf Diesel Industry Fellow

attocube systems AG

Paolo Lugli (Former Ordinarius of the Institute for Nanoelectronics)

Focus Group
Nanoimprint and Nanotransfer

Short CV

Khaled Karrai studied Physics and Engineering at the Institut National des Sciences Appliquées (INSA) in Toulouse, France. In 1984 he received his engineering degree from INSA and his diploma in physics from Université Paul Sabatier. From 1984 to 1987 he had a research period at the High Magnetic field laboratory of the Centre National de la recherche Scientifique (CNRS) and Max Planck in Grenoble. Karrai was awarded his Ph.D. in physics at Université Joseph-Fourier in 1987. The next five years he worked as a research associate and an assistant research scientist at the department of physics and astronomy of the University of Maryland, USA. He came to TUM in 1993 as a Humboldt research fellow (group of Prof. G. Abstreiter and Prof. F. Koch). From 1995 to 2006 Karrai was part of the Physics department at Ludwig-Maximilians-Universität in Munich as a Professor in Experimental Semiconductor Physics. In addition, in December 2001 he co-founded AttoCube Systems AG, manufacturing cryogenic scanning probe microscopes. Since 2007 Karrai is Chief Technical Officer and R&D head of AttoCube Systems AG.

Selected Awards

  • 2008, German Award for Outstanding Entrepreneurs
  • 2008, Munich Award for Outstanding Entrepreneurs
  • 2006, Bavarian Innovation Award
  • 2001, Winner of Business Plan Competition Munich

Research Interests

The following topics represent the core of Karrai’s research: Solid state physics – semiconductors, quantum properties, optoelectronics; Optical and mechanical properties of nanoscale systems; Methods in scanning probe microscopy and confocal spectroscopy.

Selected Publications

  • Karrai, K.; Favero, I.; Metzger, C.: Doppler Optomechanics of a Photonic Crystal. Phys. Rev. Lett. 100 (24), 2008.
  • Seidl, S.; Kroner, M.; Lux, C.; Holleitner, A. W.; Karrai, K.; Warburton, R. J.; Badolato, A.; Petroff, P. M.: Resonant transmission spectroscopy on the p to p transitions of a charge tunable InGaAs quantum dot. Appl. Phys. Lett. 92 (15), 2008, 153103.
  • Karrai, Khaled: Photonics: A cooling light breeze. Nature 444 (7115), 2006, 41-42.
  • Meyer, Christine; Sqalli, Omar; Lorenz, Heribert; Karrai, Khaled: Slip-stick step-scanner for scanning probe microscopy. Rev. Sci. Instrum. 76 (6), 2005, 063706.
  • Karrai, Khaled; Warburton, Richard J.; Schulhauser, Christian; Högele, Alexander; Urbaszek, Bernhard; McGhee, Ewan J.; Govorov, Alexander O.; Garcia, Jorge M.; Gerardot, Brian D.; Petroff, Pierre M.: Hybridization of electronic states in quantum dots through photon emission. Nature 427 (6970), 2004, 135-138.
  • Karrai, Khaled; Lorenz, Xaver; Novotny, Lukas: Enhanced reflectivity contrast in confocal solid immersion lens microscopy. Appl. Phys. Lett. 77 (21), 2000, 3459.
  • Karrai, Khaled; Grober, Robert D.: Piezoelectric tip-sample distance control for near field optical microscopes. Appl. Phys. Lett. 66 (14), 1995, 1842.

Publications as TUM-IAS-Fellow


  • Thurner, K.; Braun, P.F.; Karrai, K.: Distance metrology using a low-finesse fiber-optic Fabry-Pérot interferometer. Nanoscale 2013 Conference (Paris, France, April 2013), 2013Proceedings of the Nanoscale 2013 Conference (Paris, France, April 2013) more… BibTeX
  • Thurner, Klaus; Braun, Pierre-François; Karrai, Khaled: Fabry-Pérot interferometry for long range displacement sensing. Rev. Sci. Instrum. 84 (9), 2013, 095005 more… BibTeX Full text ( DOI )
  • Thurner, Klaus; Braun, Pierre-François; Karrai, Khaled: Fabry-Pérot interferometry for long range displacement sensing. Review of Scientific Instruments 84 (9), 2013, 095005 more… BibTeX Full text ( DOI )
  • Thurner, Klaus; Braun, Pierre-François; Karrai, Khaled: Absolute distance sensing by two laser optical interferometry. Review of Scientific Instruments 84 (11), 2013, 115002 more… BibTeX Full text ( DOI )


  • Berkovic, Garry; Shafir, Ehud: Optical methods for distance and displacement measurements. Advances in Optics and Photonics 4 (4), 2012, 441 more… BibTeX Full text ( DOI )


  • Fakhr, Omar; Altpeter, Philipp; Karrai, Khaled; Lugli, Paolo: Easy Fabrication of Electrically Insulating Nanogaps by Transfer Printing. Small, 2011 more… BibTeX Full text ( DOI )