Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 48: Poster – Quantum Optics, Technologies, and Optomechanics

Q 48.16: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Evolution of correlations in superfluorescent bursts — •Yoan Spahn, Thomas Halfmann, and Thorsten Peters — Institut für Angewandte Physik, Technische Universität Darmstadt, Hochschulstraße 6, 64289 Darmstadt, Germany

We experimentally study correlations in superfluorescent bursts emitted by a dilute, disordered ensemble of atoms inside a hollow-core fiber. Starting from an initially inverted effective two-level system, we measure the temporal evolution of the second-order coherence function of the light emitted into the waveguide mode. By varying the number of atoms as well as the decay rate, we are able to study correlations below and above threshold to collective emission. Tuning our system from individual to collective emission in the regime of multiple optical bursts, we observe a clear evolution of correlations between consecutive bursts.

Keywords: collective decay; superradiance; hollow-core fibers; waveguides