介绍了飞秒非线性光脉冲研究的最新进展.超快技术的发展已经能够产生仅含几个振荡周期的超强脉冲,其强度梯度使电子可以存在于比库仑束缚场高许多倍的外场产生的原子束缚态,并产生了同光频相差不大的电离率,从而导致了非线性光学的一些新的现象.

The latest development of research on femtosecond nonlinear optics is introduced in this article. Recent progress in ultrafast optics has allowed the generation of ultraintense light pulses comprising merely a few field oscillation cycles. The arising intensity gradient allows electrons to survive in their bound atomic state up to external field strengths many times higher than the binding Coulomb field and gives rise to ionization rates comparable to the light frequency resulting in a significant extension of the frontiers of nonlinear optics and (nonrelativistic) high field physics. Implications include the generation of coherent harmonic radiation up to keV photon energies.