Tomasz Krehlik — EIT spectroscopy in warm Rb vapour – towards preparation of the coupling beam for cold-atoms experiments

I will present an experimental setup designed for studying electromagnetically induced transparency (EIT) in a ladder scheme of Rb atoms. The highest level of the ladder can be an easily accesible 5D level, as well as the chosen Rydberg state with n about 50. The discrimination of population and coherence effects was performed, showing an important share of double-resonance optical pumping in what is conventionally referred to as the EIT feature.