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High optical harmonics generation process in atomic gases interacting with bichromatic laser field in non-collinear scheme is studied with the aim of polarization state of atomic response investigation in dependence on incident field spatial properties. It is shown that the non-dipole transitions (the impact of which increases with laser field intensity) play the crucial role in discussed process.
New interpretation of the high order harmonic generation in atomic gases interacting with laser fields is presented. The mechanism is in the temporal evolution of atomic electron density spatial distribution in the external laser field.
We present the results of theoretical study on the effective generation of both terahertz radiation and high-order harmonics in the process of a single atom interaction with a multicolor laser field. Numerical results are discussed.
The interaction between high intensity ultrashort laser pulses and the atomic gas in the ionization-free regime leads to the emission of coherent, short pulse radiation at terahertz frequency. In this work we discuss a model for this effect and its experimental realization.
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