Ultrafast Rabi flopping in a three-level energy ladder

We demonstrate Rabi oscillation of a resonant two-photon transition in a three-level ladder-type quantum system of gaseous rubidium atoms induced by a single femtosecond laser pulse. For this, we shape the flat-top spatial profile of the laser pulse and perform the ultrafast population cycling of th...

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Bibliographic Details
Published in:Optics letters 2012-08, Vol.37 (16), p.3378-3380
Main Authors: Lim, Jongseok, Lee, Kanghee, Ahn, Jaewook
Format: Article
Language:English
Subjects:
Cycles
Femtosecond
Ground state
Ladders
Lasers
Oscillations
Rabi frequency
Rubidium
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Summary:We demonstrate Rabi oscillation of a resonant two-photon transition in a three-level ladder-type quantum system of gaseous rubidium atoms induced by a single femtosecond laser pulse. For this, we shape the flat-top spatial profile of the laser pulse and perform the ultrafast population cycling of the atoms as a function of pulse energy. The experimental result confirms that the Rabi frequency of the transition from a ground state to a final state depends linearly on the pulse area, although the transition is a two-photon process.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.003378