Spectral line narrowing effect induced by atomic coherence in a three-level Λ system
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Abstract:
We present the spectral line narrowing effect in a A threeAevel atomic system where one transition is coupled by a coupling laser and the narrow feature is observed by probing the other transition with a weak laser. As coupling laser detuning increases the electromagnetically induced transparency resonance is observed to evolve into electromagnetically induced absorption resonance with sub-natural linewidth. The linewidth of the narrow spectral feature is studied as a function of coupling laser detuning and the atomic system parameters. The result is explained using density matrix density equation in the dressed-atom picture.
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Clc Number:
O431.2
