Physics – Atomic Physics
Scientific paper
2009-02-08
Physics
Atomic Physics
11 pages
Scientific paper
We report observation of a narrow (sub-natural) and high-contrast resonance of increased absorption ("bright" resonance) in Rb cell with Ne buffer gas under previously unexplored experimental conditions for coupling and probe radiation configuration. The coupling laser stabilized frequency is detuned by ~ 3 GHz from 5S1/2, Fg=3 --> 5P3/2, Fe=2,3,4 transitions, while the probe laser frequency is scanned across these transitions. We believe the bright resonance formation, occurring when the probe laser frequency is blue-shifted from the coupling frequency by a value of the ground state hyperfine splitting, is caused predominantly by a 2-photon absorption of the probe radiation 5S1/2, Fg=2 --> 5S1/2, Fg=3 with 5P3/2 as an intermediate state. We also report and interpret splitting of the bright resonance into 6 well resolved and contrast components in moderate magnetic fields (B ~ 10 - 250 G).
Grigoryan Gevorg
Leroy Christophe
Malakyan Yu.
Papoyan Aram
Pashayan-Leroy Yevgenya
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