通过优化双色激光场的波形来扩展高次谐波的截止位置

摘要

The waveform of a two‐color laser field is determined by using a genetic algorithm to optimize the maximum electron recollision energy . The high‐harmonic cutoff generated by the optimized laser field can be extended by about two times without increasing total laser power ,and without losing the harmonic yield . The present simulations will have an enormous impact on the future application of HHG in the laboratory .%利用遗传算法优化了电子在电场中运动获得的最大返回动能，得到了组合双色场的波形。结果表明，在激光脉冲总能量不变的前提下，优化得到的双色场能够将产生的高次谐波的截止位置提高2倍，而且谐波场的强度不会有明显的降低。本文的结果可为实验上更好地实现宽频高次谐波提供理论指导。