强非相对论短脉冲Laser辐照下超薄纳米薄膜的谐波产生
Harmonics Generation in Ultra-Thin Nanofilms Irradiated by Intense Nonrelativistic Short Laser Pulse
摘要：
在纳米靶中的谐波产生的问题被认为是在参数范围内（纳米靶直径和泵浦激光强度）时，在目标中的电子的振荡幅度远大于目标的宽度。电子运动带电纳米靶在不同的激光场（非相对论）强度的存在下被认为是。证明了在红外波段的激光作用下，团簇不具有足够强的束缚电子的势，使电子具有大的振荡幅度。与团簇相反，纳米膜被认为是所考虑问题中非常有前景的目标。一个简单的分析模型和分子动力学模拟表明，增加谐波产生时，在薄膜中的电子的振荡幅度变得更大，比膜的宽度。简要讨论了不同制度的生成。
英文摘要：
The problem of harmonics generation in nanotargets is considered at the range of parameters (a nanotarget diameter and a pump laser intensity) when the oscillation amplitude of an electron in a target is much larger than the target width. Electron motion in charged nanotargets in the presence of a laser field of different (non-relativistic) strength is considered. It is demonstarted that for lasers of infrared frequencies clusters do not posess strong enough potential to bound electrons with large oscillation amplitudes. Opposite to clusters, nanofilms were found to be very perspective targets in the problem considered. A simple analytic model and molecular dynamic simulations showed increased harmonics generation when the oscillation amplitude of electrons in a film becomes much larger, than the film width. Different regimes of generation are briefly discussed.
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