Physics – Quantum Physics
Scientific paper
2011-01-31
Physical Review A: Atomic, Molecular and Optical Physics 83 (2011) 053809
Physics
Quantum Physics
Scientific paper
Electromagnetically induced transparency (EIT) has mainly been modelled for three-level systems. In particular, a considerable interest has been dedicated to the Lambda-configuration, with two ground states and one excited state. However, in the alkali-metal atoms, which are commonly used, hyperfine interaction in the excited state introduces several levels which simultaneously participate in the scattering process. When the Doppler broadening is comparable with the hyperfine splitting in the upper state, the three-level Lambda model does not reproduce the experimental results. Here we theoretically investigate the EIT in a hot vapor of alkali-metal atoms and demonstrate that it can be strongly reduced due to the presence of multiple excited levels. Given this model, we also show that a well-designed optical pumping enables to significantly recover the transparency.
Bramati Alberto
Felinto Daniel
Giacobino Elisabeth
Kupriyanov Dmitriy V.
Laurat Julien
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