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Recollision with circular polarization
How Key Periodic Orbits Drive Recollisions in a Circularly Polarized Laser Field
![]() Abstract We show that a family of key periodic orbits drives the recollision process in a strong circularly polarized laser field. These orbits, coined recolliding periodic orbits, exist for a wide range of parameters, and their relative influence changes as the laser and atomic parameters are varied. We find the necessary conditions for recollision-driven nonsequential double ionization to occur. The outlined mechanism is universal in that it applies equally well beyond atoms: The internal structure of the target species plays a minor role in the recollision process.Reference A. Kamor, F. Mauger, C. Chandre, and T. Uzer - How Key Periodic Orbits Drive Recollisions in a Circularly Polarized Laser Field - Physical Review Letters 110, 253002 (2013) |
Recollisions and Correlated Double Ionization with Circularly Polarized Light
![]() Abstract It is generally believed that the recollision mechanism of atomic nonsequential double ionization is suppressed in circularly polarized laser fields because the returning electron is unlikely to encounter the core. On the contrary, we find that recollision can and does significantly enhance double ionization, even to the extent of forming a ‘‘knee,’’ the signature of the nonsequential process. Using a classical model, we explain two apparently contradictory experiments, the absence of a knee for helium and its presence for magnesium.Reference F. Mauger, C. Chandre, and T. Uzer - Recollisions and Correlated Double Ionization with Circularly Polarized Light - Physical Review Letters 105, 083002 (2010)Outreach
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