Phys. Rev. A 72, 063404 (2005) [5 pages]Selective transition to the closely-lying states Cs(7D3∕2) and Cs(7D5∕2) by femtosecond laser pulsesReceived 20 June 2005; published 6 December 2005 A demonstration of coherent quantum control for ultrafast precise selection of closely-lying states is reported. A phase-locked pair of femtosecond laser pulses is generated through a pulse shaper to excite the ground-state cesium atom to the Cs(7D3∕2) and Cs(7D5∕2) states by two-photon absorption. The excited state population is measured by detecting fluorescence from each spin-orbit state. By controlling the phase-difference of the pulse pair, an ultrafast precise selection is accomplished. The contrast ratio of the maximal to minimal selection ratio exceeds 103 with the delay less than 400 fs. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.063404
DOI:
10.1103/PhysRevA.72.063404
PACS:
32.80.Qk
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