Spectroscopy of Coherent Dark Resonances in Samarium

摘要

A theoretical model of the coherent population trapping (CPT) in multilevel samarium atom and its comparison with experimental spectroscopic data are presented. Theoretical model describes a degenerated A-system in Sm atom formed of the transitions 4f~66s~2(~7F_0) reversible 4f~6(~7F)6s6p(~3P°)~9F°_1 reversible 4f~66s~2(~7F_1) and includes also a fourth level 4f~66s~2(~7F_2), which complements the model making it an open system. An open character of the system reduces the contrast of the resonance curves in the CPT-spectra, but does not change the width of the CPT resonance. Numerical modeling of the CPT resonances in Sm atom was carried out for the case of applied longitudinal and transverse magnetic fields in 7- and 12-level models, as well.