Microwave Rabi Resonances of Cs atom are observed by using optical pumping and optical detection with a laser diode. In case of Δ
F=0, π porahzed pumping light,
mF=0 atoms remain in the same magnetic sublevel. This result leads to the realization of pumping all Cs atoms into a
mF=0 single magnetic sublevel by the, use of two lasers.
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