CEP control of multiphoton ionization using shaper-generated variable frequency ratio bichromatic fields
Carl von Ossietzky University, Institute of Physics, Carl-von-Ossietzky-Straße 9-11, 26129 Oldenburg
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Published online: 16 April 2019
We demonstrate CEP control of the directional photoemission from multiphoton ionization (MPI) of xenon atoms using (7ω:8ω) bichromatic fields whose frequency ratio is tailored to the order of the MPI process. The bichromatic fields are generated by white light supercontinuum polarization pulse shaping. In the experiment, we observe a CEP-sensitive lateral asymmetry of up to 70%. The CEP sensitivity arises from interference of opposite parity continuum states coupled to the ground state by a different number of photons.
© The Authors, published by EDP Sciences, 2019