Production of high energy-solid density electron bunches and hard γ-quanta and positron fluxes by ultrarelativistic lasers in solid-plasma targets

We consider nonlinear interaction of superpower laser pulses of relativistic intensities with nanolayers and solid-plasma targets toward the production of high energy-density electron and positron bunches along with high energy photon fluxes. It is shown that petawatt lasers are capable of producing via two-target scheme high density field-free electron/positron bunches and substantial amounts of gamma-quanta with energies up to 200 MeV. For actual supershort and tightly focused-strongly nonplane ultrarelativistic laser pulses of linear and circular polarizations, the 3D3V problem is solved via numerical simulations.