Mainz 2017 – scientific programme

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A: Fachverband Atomphysik

A 17: Rydberg atoms

A 17.3: Talk

Tuesday, March 7, 2017, 15:00–15:15, N 3

Strong light-matter coupling in Rydberg excitons — •Peter Grünwald¹, Julian Heckötter², Marc Aßmann², Dietmar Fröhlich², Manfred Bayer², Heinrich Stolz¹, and Stefan Scheel¹ — ¹Institut für Physik, Universität Rostock, Rostock, Germany — ²Experimentelle Physik 2, TU Dortmund, Dortmund, Germany

Rydberg systems show strong light-matter coupling due to the long life times and large dipole moments of states with high principal quantum number n. In Rydberg excitons [1], the single-exciton light-matter coupling is weak. However, due to collective excitation, strong coupling occurs even for low laser intensities (∼µW/mm²). Additionally, the high-n exciton states display little pure dephasing [2], making them interesting for quantum-optical research. We will discuss the optical properties of Rydberg excitons, and their implications for the Rydberg exciton fluorescence. In particular, nonclassical effects and their detection will be addressed. Because of the limited detection efficiency, homodyne correlation measurements [3] are required.

[1] T. Kazimierczuk et al., Nature 514, 343 (2014).

[2] P. Grünwald et al., Phys. Rev. Lett. 117, 133003 (2016).

[3] W. Vogel, Phys. Rev. A 51, 4160 (1995).