Nondipole effects in terahetz-pulse-assisted strong-field ionization
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Date
2022
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Volume
30
Issue
17
Journal
Optics express : the international electronic journal of optics
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Publisher
Washington, DC : Soc.
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Abstract
Nondipole effects in processes assisted by a THz field having the strength of a few MV/cm can be significant due to its long wavelength. We illustrate this for strong-laser-field-induced ionization assisted by a THz field. To this end, we generalize our strong-field-approximation theory so that it includes the first-order term in a 1/c expansion of the vector potential. We show that in this case, in addition to a shift of the maximum of the photoelectron momentum distribution, the differential ionization probability as well as the cutoff energy can be significantly increased. For an explanation of these unexpected results we use the saddle-point method adjusted to include nondipole effects.
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Milošević, D. B., & Habibović, D. (2022). Nondipole effects in terahetz-pulse-assisted strong-field ionization (Washington, DC : Soc.). Washington, DC : Soc. https://doi.org//10.1364/OE.468146
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Optica Open Access Publishing Agreement