CAOSP abstracts, Volume: 53, No.: 3, year: 2023

Author(s): Cinins, A.; Dimitrijević, M.S.; Srećković, V.A.; Bruvelis, M.; Miculis, K.; Bezuglov, N.N.; Ekers, A.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 53, no. 3, p. 72-83.
Date: 12/2023
Title: Spectroscopy of adiabatic dark states under two-photon excitation of sodium atoms
Keyword(s): laser excitation, optical adiabatic states, Na spectra, dark state peaks
Pages: 72 -- 83
DOI: https://doi.org/10.31577/caosp.2023.53.3.72
NASA ADS Abstract Service: 2023CoSka..53c..72C
Citation:
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: This work focuses on visualization of dark states arising in systems of hyperfine states upon two-photon excitation. In our experiment, levels 3S_1/2 and 3P_1/2 of sodium atoms are coupled by a strong S-laser field forming the laser-dressed adiabatic states, which are then monitored by scanning a weak probe P-field across the 3P_1/2 → 7D_3/2 transition. The excitation spectrum of the 7D_3/2 state exhibits one main peak and several side peaks. The latter shift farther apart with increasing S-laser intensity, while the position of the main peak is hardly affected, which associates its origin with a class of dark states decoupled from laser interactions. The results of numerical simulation of the observed spectra based on the solution of the optical Bloch equations are in good agreement with the experimental data. The results are of interest for atomic and laser physics.