POPULATION TRAPPING AND ELECTRON-SCATTERING IN THE LASER EXCITATION OF A REALISTIC AUTOIONIZING LEVEL

E.G. Aleksandrov

Roberto Buffa, J. K. Spong

LONG DE-SHUN, Ning Xi-Jing, 复旦大学现代物理研究所,上海200433

The critical criterion for realizing population trapping is deduced for a two-level system driven by a frequency-modulated laser field in terms of dressed atom model, followed by demonstrating the various population trapping behaviours under different conditions. Detailed numerical solutions of time-dependent Schr?idinger equation are found to be in good agreement with the analytical results.

XuLeiZHAO, Yuo-yuan

In this work.superradiation in found to play an important role to populate the metastable level 6s5d ^1 D2 from which 5dnd(J=4) autoionizing Rydberg series were excited through double-resonant laser driving.Experimental results were analysed using 5-channel quantum defect treatment in which three autoionizing Rydberg series and two open channels were included.

Reinhard Morgenstern