@article{HolzingerSchneiderHoeflingetal.2019,
  author    = {Holzinger, Steffen and Schneider, Christian and H{\"o}fling, Sven and Porte, Xavier and Reitzenstein, Stephan},
  title     = {Quantum-dot micropillar lasers subject to coherent time-delayed optical feedback from a short external cavity},
  series = {Scientific Reports},
  volume    = {9},
  journal   = {Scientific Reports},
  doi       = {10.1038/s41598-018-36599-3},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-322485},
  year      = {2019},
  abstract  = {We investigate the mode-switching dynamics of an electrically driven bimodal quantum-dot micropillar laser when subject to delayed coherent optical feedback from a short external cavity. We experimentally characterize how the external cavity length, being on the same order than the microlaser's coherence length, influences the spectral and dynamical properties of the micropillar laser. Moreover, we determine the relaxation oscillation frequency of the micropillar by superimposing optical pulse injection to a dc current. It is found that the optical pulse can be used to disturb the feedback-coupled laser within one roundtrip time in such a way that it reaches the same output power as if no feedback was present. Our results do not only expand the understanding of microlasers when subject to optical feedback from short external cavities, but pave the way towards tailoring the properties of this key nanophotonic system for studies in the quantum regime of self-feedback and its implementation to integrated photonic circuits.},
  language  = {en}
}
@article{SchlottmannSchickeKruegeretal.2019,
  author    = {Schlottmann, Elisabeth and Schicke, David and Kr{\"u}ger, Felix and Lingnau, Benjamin and Schneider, Christian and H{\"o}fling, Sven and L{\"u}dge, Kathy and Porte, Xavier and Reitzenstein, Stephan},
  title     = {Stochastic polarization switching induced by optical injection in bimodal quantum-dot micropillar lasers},
  series = {Optics Express},
  volume    = {27},
  journal   = {Optics Express},
  number    = {20},
  doi       = {10.1364/OE.27.028816},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-228603},
  pages     = {28816-28831},
  year      = {2019},
  abstract  = {Mutual coupling and injection locking of semiconductor lasers is of great interest in non-linear dynamics and its applications for instance in secure data communication and photonic reservoir computing. Despite its importance, it has hardly been studied in microlasers operating at mu W light levels. In this context, vertically emitting quantum dot micropillar lasers are of high interest. Usually, their light emission is bimodal, and the gain competition of the associated linearly polarized fundamental emission modes results in complex switching dynamics. We report on selective optical injection into either one of the two fundamental mode components of a bimodal micropillar laser. Both modes can lock to the master laser and influence the non-injected mode by reducing the available gain. We demonstrate that the switching dynamics can be tailored externally via optical injection in very good agreement with our theory based on semi-classical rate equations. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement},
  language  = {en}
}