Multiple attosecond pulse generation in relativistically laser-driven overdense plasmas

Abstract

Using particle-in-cell simulations, we investigate the mechanisms that lead to attosecond pulses when anobliquely incident laser pulse interacts with an overdense plasma.We show that several attosecond pulses can be emitted per laser cycle as a result of the ejection of electron bunches associated with return currentswithin the plasma. The electron dynamics are investigated in phase space and with the help of the similarityparameter S = ne/a0nc. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.