Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany.
Phys Rev Lett. 2009 Dec 11;103(24):245003. doi: 10.1103/PhysRevLett.103.245003. Epub 2009 Dec 9.
We present experimental studies on ion acceleration from ultrathin diamondlike carbon foils irradiated by ultrahigh contrast laser pulses of energy 0.7 J focused to peak intensities of 5x10(19) W/cm2. A reduction in electron heating is observed when the laser polarization is changed from linear to circular, leading to a pronounced peak in the fully ionized carbon spectrum at the optimum foil thickness of 5.3 nm. Two-dimensional particle-in-cell simulations reveal that those C6+ ions are for the first time dominantly accelerated in a phase-stable way by the laser radiation pressure.
我们提出了关于在能量为 0.7 J 的超高峰值强度为 5x10(19) W/cm2 的超高对比度激光脉冲照射下，超薄类金刚石碳箔中离子加速的实验研究。当激光偏振从线性变为圆形时，电子加热会减少，从而在最佳箔厚度为 5.3nm 时导致完全电离的碳光谱中出现明显的峰值。二维粒子模拟揭示了这些 C6+离子首次主要通过激光辐射压力以相稳定的方式加速。
