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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.19: Poster
Dienstag, 10. März 2020, 16:30–18:30, Empore Lichthof
Investigation of time dynamics of atom-light interaction in the superstrong coupling regime — •Martin Blaha1, Aisling Johnson1, Philipp Schneeweiss2, Arno Rauschenbeutel2, and Jürgen Volz2 — 1TU Wien, 1020 Wien, Austria — 2HU Berlin, 12489 Berlin, Germany
We report on the observation of superstrong coupling between a cloud of cold atoms and a 50-m long nanofiber-based fiber ring resonator[1]. This novel regime of light-matter coupling is reached when the collective coupling strength between a cloud of laser-cooled Cesium atoms and the light field exceeds the free spectral range (FSR) of the resonator leading to simultaneous strong coupling of the atoms with more than one longitudinal resonator mode[2].
In a next step, we investigate the dynamics of the atom-resonator interaction in this regime. For this we probe the system with a few nanosecond long pulse shorter than the dynamical time scales in the resonator. We monitor the time-dependent response of the coupled system and observe a direction-dependent and collective decay in forwards direction while the dynamics in backwards direction is equivalent to the decay time of a free-space atom.
[1] A. Johnson et al., arXiv:1905.07353(2019).
[2] D. Meiser et al., Phys. Rev. A 74, (2006).