2021/09/23 by Cheng, Lin, Fan, Zhixin, Jiao, Liguang +1
#FOS: Physical sciences #Optics (physics.optics) #Plasma Physics (physics.plasm-ph)
paper · doi:10.48550/arxiv.2109.11412
The creation of attosecond pulses via laser-plasma interaction has been a subject of great scientific interest for more than three decades. This process is investigated by using particle-in-cell simulation with varying the plasma and laser parameters. The steepness of the density gradient at the plasma-vacuum interface is examined to see how this parameter affects the high-order harmonic generations and isolated-attosecond pulse creation. The optimal density gradient lengths L are explored within the relativistic oscillating mirror mechanism. Although the ideal gradient lengths for the full width at half maximum and peak intensity of an isolated-attosecond pulse depend on the driving laser intensity independently, they are both found near L=0.2λ for high laser intensities.