The interaction of excited atoms and few-cycle laser pulses

2016/01/15 by James Calvert, Calvert, J. E., Xu Han +12
Engineering · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Laser Design and Applications #Laser-Matter Interactions and Applications

paper · pdf · doi:10.48550/arxiv.1601.03786

openalex publication_date 2016/01/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

This work describes the first observations of the ionisation of neon in a metastable atomic state utilising a strong-field, few-cycle light pulse. We compare the observations to theoretical predictions based on the Ammosov-Delone-Krainov (ADK) theory and a solution to the time-dependent Schrodinger equation (TDSE). The TDSE provides better agreement with the experimental data than the ADK theory. We optically pump the target atomic species and demonstrate that the ionisation rate depends on the spin state of the target atoms and provide physically transparent interpretation of such a spin dependence in the frameworks of the spin-polarised Hartree-Fock and random-phase approximations.

Related

• Laser Stabilised Ionising Transitions
• A new physical mechanism for the onset of atomic ionization in an optical field with jolts of phase
• The role of light ellipticity in ionization of atoms by intense few-cycles laser pulses
• Factorisation of laser pulse ionisation probabilities in the multiphotonic regime
• Nondipole strong-field approximation for above threshold ionization in few-cycle pulse