Abstract
In a saturated two-level atomic system driven by a strong, near-resonant field, a large population difference between the two energy levels is recovered by an additional strong off-resonant laser field. This implies that the stimulated transition between the energy levels is inhibited by the additional laser field. This effect is attributed to the transverse resonance which has been extensively studied in the radio-frequency spectroscopy. It is also shown that the definite dispersion-free condition is realized when the intensities of the saturating field and the second field are the same.
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