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

TL;DR

This paper introduces a novel spectroscopic method combining pulsed optical pumping and stimulated emission probing to measure hyperfine interactions in atomic cesium, providing precise values for magnetic and electric quadrupole coupling constants.

Contribution

It presents a new experimental approach for measuring hyperfine quantum beats in atomic cesium using stimulated emission as a probe.

Findings

Measured hyperfine coupling constants A = 7.42(6) MHz and B = 0.14(29) MHz.

Demonstrated the effectiveness of stimulated emission probing in hyperfine measurements.

Provided a new technique for high-precision atomic hyperfine structure analysis.

Abstract

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