Multipass relativistic high-order-harmonic generation for intense attosecond pulses

作者：Edwards Matthew R^*; Mikhailova Julia M^*

来源：Physical Review A, 2016, 93(2): 023836.

DOI：10.1103/PhysRevA.93.023836

We demonstrate that the total reflected field produced by the interaction of a moderately relativistic laser with dense plasma is itself an efficient driver of high-order-harmonic generation. A system of two or more successive interactions of an incident laser beam on solid targets may therefore be an experimentally realizable method of optimizing conversion of laser energy to high-order harmonics. Particle-in-cell simulations suggest that attosecond pulse intensity may be increased by up to four orders of magnitude in a multipass system, with decreased duration of the attosecond pulse train. We discuss high-order-harmonic wave-form engineering for enhanced attosecond pulse generation with an electron trajectory model, present the behavior of multipass systems over a range of parameters, and offer possible routes towards experimental implementation of a two-pass system.

• 出版日期2016-2-24