Higher-Order Kerr Terms Allow Ionization-Free Filamentation in Gases
Higher-Order Kerr Terms Allow Ionization-Free Filamentation in Gases
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DOI：
10.1103/physrevlett.104.103903
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发表时间：
2010-03-12
影响因子：
8.6
通讯作者：
Wolf, J. -P.
中科院分区：
文献类型：
--
作者：
Bejot, P.;Kasparian, J.;Wolf, J. -P.
我们发现，高阶非线性指数（n（4），n（6），n（8），n（10））提供了主要的散焦贡献的超短激光脉冲在空气和氩气中的自沟道在800 nm，与以前接受的机制，其中等离子体被认为是占主导地位的散焦过程。他们的考虑使我们能够重现实验观察到的强度和等离子体密度在自导向丝。
We show that higher-order nonlinear indices (n(4), n(6), n(8), n(10)) provide the main defocusing contribution to self-channeling of ultrashort laser pulses in air and argon at 800 nm, in contrast with the previously accepted mechanism of filamentation where plasma was considered as the dominant defocusing process. Their consideration allows us to reproduce experimentally observed intensities and plasma densities in self-guided filaments.