Angular dispersion boost of high order laser harmonics interacting with dense plasma clusters

We propose a nanosphere array target in the plasma phase as an efficient dispersive medium for the intense XUV light originated from laser-plasma interactions where various high harmonic generation processes take place. The scattering process is studied with the help of numerical simulations using resonance conditions obtained from the analytical model. We show that the angular distribution of different harmonics after scattering can be good described by a simple interference, in particular for the rectangle symmetry the angular distribution corresponds to the Bragg-Wolfe diffraction theory.