Multi-Channel Selective Femtosecond Coherent Control Based on Symmetry Properties

Details Multi-Channel Selective Femtosecond Coherent Control Based on Symmetry Properties Multi-Channel Selective Femtosecond Coherent Control Based on Symmetry Properties

2007-09-30

arxiv.org/abs/0710.0149v1

Phys. Rev. Lett. 100, 193002 (2008)

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevLett.100.193002

We present and implement a new scheme for extended multi-channel selective femtosecond coherent control based on symmetry properties of the excitation channels. Here, an atomic non-resonant two-photon absorption channel is coherently incorporated in a resonance-mediated (2+1) three-photon absorption channel. By proper pulse shaping, utilizing the invariance of the two-photon absorption to specific phase transformations of the pulse, the three-photon absorption is tuned independently over order-of-magnitude yield range for any possible two-photon absorption yield. Noticeable is a set of two-photon dark pulses inducing widely-tunable three-photon absorption.

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