Promotionsvortrag Physik: „Modelling and experimental control of hot rubidium vapour in hollow-core fibres“

Ankündigung des Promotionsvortrags von Herrn Daniel Häupl:

Hollow-core photonic crystal fibres (HC-PCF) filled with hot alkali vapour are a versatile platform for studying Rydberg physics at ambient temperature. In this cooperation with the Fifth Physical Institute at the University of Stuttgart an all-glass vapour cell containing a hollow-core PCF was developed. Such a cell allows much faster filling rates than previously reported. Furthermore, the all-glass design offers optical access to the emitted fluorescence along the fibre length for live monitoring of the diffusion of rubidium atoms into the HC-PCF.

The tight confinement of light inside the fibre core leads to intensities above saturation. However, this is not taken into account by the widely used computer model ElecSus, which assumes a weak probe and is therefore unsuitable. I therefore developed an improved model to predict the atomic spectra for such high light intensities. To validate the model, spectroscopic measurements of Rb-87 vapour were performed, covering a large parameter space. Finally, I discuss the possibility to use a Rydberg transition in rubidium to generate THz radiation.

(Vortrag auf Englisch)

Dem Vortrag schließt sich eine Diskussion von 15 Minuten an. Vortrag und Diskussion sind öffentlich. Diesen Verfahrensteilen folgt ein nicht öffentliches Rigorosum von 45 Minuten.