Resonanz-Fluoreszenz in kohärent gekoppelten Quantenpunkt-Mikrosäulenresonatoren

• Applicants: Professor Dr. Martin Kamp; Professor Dr. Stephan Reitzenstein
• Subject Area: Experimental Condensed Matter Physics
• Term: from 2012 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 212043261

• Final Report Year: 2017

Final Report Abstract

Within the funding period, all central goals of the project have been achieved. As far as the work in Würzburg is concerned, the main results of the project are: Optimization of QD-micropillar technology for the realization of samples operating in the strong light-matter coupling regime with more than 50% yield using In0.4Ga0.6As/GaAs QDs featuring increased oscillator strengths exceeding 20 in combination with high Q-factor (13 000 on average) and small mode volume 10(λ/n)3 micropillar cavities. Realization of samples for operation in the weak coupling regime for the investigation of dressed states, based on In0.45Ga0.55As/GaAs quantum dots in small (1.5 µm diameter) micropillars with high quality factors between 14000 and 19000. Development of a process for the self-aligned fabrication of metal apertures for QD-micropillars, resulting in efficient stray light suppression (up to a factor of 15 compared to samples without metal apertures) in resonance fluorescence experiments under side excitation.

Publications

• “Correlations between axial and lateral emission of coupled quantum dotmicropillar cavities”, Phys. Rev. B 91, 205310 (2015)
  A. Musiał, C. Hopfmann, T. Heindel, C. Gies, M. Florian, H. A. M. Leymann, A. Foerster, C. Schneider, F. Jahnke, S. Höfling, M. Kamp, and S. Reitzenstein
  
• “Cavity-enhanced simultaneous dressing of quantum dot exciton and biexciton states”, Phys. Rev. B 93, 115308 (2016)
  F. Hargart, M. Müller, K. Roy-Choudhury, S. L. Portalupi, C. Schneider, S. Höfling, M. Kamp, S. Hughes, and P. Michler
  
• “Efficient stray-light suppression for resonance fluorescence in quantum dot micropillars using self-aligned metal apertures”, Semicond. Sci. Technol. 31, 095007 (2016)
  C. Hopfmann, A. Musiał, S. Maier, M. Emmerling, C. Schneider, S. Höfling, M. Kamp, and S. Reitzenstein
  
• “Probing different regimes of strong field light-matter interaction with semiconductor quantum dots and few cavity photons”, New J. Phys. 18, 123031 (2016)
  F. Hargart, K. Roy-Choudhury, T. John, S. Luca Portalupi, C. Schneider, S. Höfling, M. Kamp, S. Hughes, and P. Michler
  
• “Transition from Jaynes-Cummings to Autler- Townes ladder in a quantum dot - microcavity system”, Phys. Rev. B 95, 035302 (2017)
  C. Hopfmann, A. Carmele, A. Musiał, C. Schneider, M. Kamp, S. Höfling, A. Knorr, and S. Reitzenstein