Sharply autofocused ring-Airy beams transforming into non-linear intense light bullets
Sharply autofocused ring-Airy beams transforming into non-linear intense light bullets
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DOI：
10.1038/ncomms3622
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发表时间：
2013-10-01
影响因子：
16.6
通讯作者：
Tzortzakis, S.
中科院分区：
文献类型：
--
作者：
Panagiotopoulos, P.;Papazoglou, D. G.;Tzortzakis, S.
控制强光波包在透明介质中的传播不是一项简单的任务。在传播过程中，低阶和高阶非线性效应，包括克尔效应、多光子吸收和电离，导致光波包的不受控制的复杂整形，包括脉冲分裂、空间中的重新聚焦周期和焦点的显著变化。在这里，我们证明了数值和实验，强烈的，突然自动聚焦光束的形式加速环艾里光束能够重塑成非线性的强烈的光子弹波包传播的距离很长，而他们在空间中的定位是非常明确的。这些独特的波包可以在许多领域提供显着的优势，例如高次谐波的产生和阿秒物理或材料的精确微工程。
Controlling the propagation of intense optical wavepackets in transparent media is not a trivial task. During propagation, low-and high-order non-linear effects, including the Kerr effect, multiphoton absorption and ionization, lead to an uncontrolled complex reshaping of the optical wavepacket that involves pulse splitting, refocusing cycles in space and significant variations of the focus. Here we demonstrate both numerically and experimentally that intense, abruptly autofocusing beams in the form of accelerating ring-Airy beams are able to reshape into non-linear intense light-bullet wavepackets propagating over extended distances, while their positioning in space is extremely well defined. These unique wavepackets can offer significant advantages in numerous fields such as the generation of high harmonics and attosecond physics or the precise micro-engineering of materials.