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In our group we investigate Quantum Optics by exploring interactions between single photons and single atoms.

We achieve this by coupling single, laser-cooled Rb atoms to high-quality chip-based optical micro-resonators.
By confining light in such a small volume, the electric field of even a single photon is enhanced to a level that allows
coherent interaction with a single atom.

Research Projects:

 - Routing of single photons by a single atom.
      See our recent papers
      "Extraction of a single photon from an optical pulse",
   Nature Photonics 10, 19-22 (2016).

"All-optical routing of single photons by a one-atom switch
      controlled by a single photon
, Science 345, 903 (2014).

 - All-optical quantum memory and quantum gate.

  - Ultra-sensitive measurements using Whispering Gallery
      See our recent paper
      "Cavity ring-up spectroscopy for ultrafast sensing with optical
, Nature Communications 6, 6788 (2015).