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Research Group Hunger

Prof. Dr. David Hunger


Physikalisches Institut
Wolfgang-Gaede-Str. 1
D-76131 Karlsruhe, Germany

tel. +49 721 608 43510
sekr. +49 721 608 43451
fax +49 721 608 46103
mail david.hunger∂kit.edu


Phd:  2010, Physics, Ludwig-Maximilians-University Munich, Germany
Diploma degree:   2005, Physics, Ludwig-Maximilians-University Munich, Germany


Since 2016:  Professor, KIT Karlsruhe, Germany
2011 - 2016:  Group Leader, Ludwig-Maximilians University Munich, Germany
2011:  Post Doc, Harvard University, USA
2010:  Post Doc, Ludwig-Maximilians-University Munich, Germany


Field of research

Our group is exploring the enhancement of light-matter interactions with optical microcavities in the fields of solid state quantum optics, optical sensing, microscopy, spectroscopy, and optomechanics.
One of the central goals is to realize efficient light-matter interfaces at the single quantum level, and to enable novel schemes for spectroscopy and sensing. We employ and further develop fiber-based Fabry-Perot microcavities, which combine microscopic mode volumes with exceptionally high quality factors, and at the same time offer open access for a variety of samples.

Current work includes the realization of a coherent spin-photon interface for NV centers in diamond, qubit control of individual rare earth ions, and cavity-enhanced sensing of nanosystems in liquid environments.


  • 11/18: The Max Planck School of Photonics has launched, with a first call for students opened until 15.12.2018. We are participating and offer a PhD project within the school!
  • 10/18: The Quantum Flagship is now officially announced, and with it the project SQUARE where we are part of. Have a look at the press release and webpage SQUARE.
  • 10/18: Press release for the quantum repeater project q.link.x online: link
  • 10/18: Quantum Flagship Kickoff announced (link): We will be part of it! Press release to come soon
  • 09/18: Paper accepted: B. Casabone et al., Cavity-enhanced spectroscopy of a few-ion ensemble in Eu:Y2O3, New Journal of Physics, http://iopscience.iop.org/article/10.1088/1367-2630/aadf68
  • 09/18: Paper published: B. T. Walker et al., Driven-dissipative Bose-Einstein condensation of just a few photons, Nature Physics, https://www.nature.com/articles/s41567-018-0270-1
  • 08/18: BMBF-founded project "Quantum Link Extended" (q.link.x) has started. We will contribute to realize a quantum repeater link based on color centers in diamond within Germany.
  • new publication: C. Gebhardt et al., Polariton hyperspectral imaging of two-dimensional semiconductor crystals, https://arxiv.org/abs/1803.08690
  • new publication: B. Casabone et al., Cavity-enhanced spectroscopy of a few-ion ensemble in Eu:Y2O3, https://arxiv.org/abs/1802.06709
  • new publication: P. R. Dolan et al., Robust, tunable, and high purity triggered single photon source at room temperature using a nitrogen-vacancy center defect in diamond in an open microcavity, Optics Express 26, 7056 (2018)
  • new publication: B. T. Walker et al., Driven-dissipative Bose-Einstein condensation of just a few photons, https://arxiv.org/abs/1711.11087
  • new publication: M. Förg et al., Cavity-control of bright and dark interlayer excitons in van der Waals heterostructures: https://arxiv.org/abs/1710.00990
  • Since mid of October 2017 our labs are (almost) ready and first experiments are running!
  • On 27. and 28.09.2017 we hosted the annual Rare Earth Ion Workshop with about 60 participants.