Photoelectron momentum distributions of Ne and Xe dimers in counter-rotating circularly polarized laser fields |
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Affiliation: | Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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Abstract: | The strong-field ionization of dimers is investigated theoretically in counter-rotating circularly polarized laser fields. By numerically solving the two-dimensional (2D) time-dependent Schrödinger equation (TDSE) with the single-electron approximation (SEA) frame, we present the photoelectron momentum distributions (PMDs) and photoelectron angular distribution (PADs) of aligned Ne and Xe dimers. It is found that the PMDs and PADs strongly depend on the time delays by counter-rotating circularly polarized laser pulses. The results can be explained by the ultrafast photoionization model and the evolution of electron wave packets for Ne and Xe dimers. Besides, We make a comparison of PMDs between Ne atom and Ne dimer. |
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Keywords: | time-dependent Schrö dinger equation dimer photoelectron momentum distributions ultrafast photoionization model |
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