Quantum beat spectroscopy: stimulated emission probe of hyperfine quantum beats in the atomic Cs 8p $^{2}P_{3/2}$ level

摘要

Measurements of hyperfine polarization quantum beats are used determine themagnetic dipole (A) and electric quadrupole (B) coupling constants in theexcited atomic Cs 8p level. The experimental approach is a novel combination ofpulsed optical pumping and time-delayed stimulated emission probing of theexcited level. From the measured evolution of the atomic linear polarizationdegree as a function of probe delay time, we determine the hyperfine couplingconstants A = 7.42(6) MHz and B = 0.14(29) MHz.