Quantum efficiency improvement of a cesium based resonance fluorescence detector by helium-induced collisional excitation energy transfer |
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| Institution: | 1. Department of Chemistry, University of Florida, Gainesville, FL 32611, USA;2. Institute of Physics, 10000 Zagreb, Croatia;1. University of Pardubice, Faculty of Chemical Technology, Doubravice 41, 53210 Pardubice, Czech Republic;2. University of Rostock, Institute of Physics, Wismarsche Str. 43–45, 18051 Rostock, Germany;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029, Beijing, China;2. Hybrid Materials Interfaces Group, Faculty of Production Engineering, University of Bremen, D-28359, Bremen, Germany |
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| Abstract: | Quantum efficiency improvement of a cesium based resonance fluorescence detector (RFD) was achieved by enhancing the transfer in a particular channel of the RFD excitation scheme with noble gas-induced collisional excitation energy transfer (CEET). The influence of Cs–Ar and Cs–He collisional mixing between the 6D and 7P states in cesium on the quantum efficiency of the 6S → 6D → 7P → 6S excitation scheme was investigated by fluorescence measurements at relevant transitions. Ar-induced CEET was found to have little effect on the fluorescence response and quantum efficiency of the Cs RFD excitation scheme. However, a 35 fold quantum efficiency increase in the cesium resonance fluorescence detector response at only moderate He pressures was observed. |
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