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Abstract
AbstractWe develop the theory of penetration of an intense femtosecond laser pulse through ultra‐thin metal foils. When the electron excursion length in laser field exceeds the foil thickness we cannot use the hydrodynamic approach, i.e. there is no dielectric constant of the foil, and well known macroscopic Fresnel formulas are inapplicable. We solve the Vlasov selfconsistent equations for the electromagnetic field inside the foil collisionless plasma. In the case of the linearly polarized laser field such a problem has been solved recently. Our current goal is the circularly polarized laser field since the electron velocities in this case are much greater than that for linearly polarized field. We found that the resonance peaks in the penetrations of radiation through the foil appear at definite foil thicknesses (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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