丝状化
空气束
物理
沟道等离子体
光学
激光器
等离子体
飞秒
梁(结构)
弯曲分子几何
超短脉冲
单色
材料科学
量子力学
复合材料
作者
Pavel Polynkin,Miroslav Kolesik,Jerome V. Moloney,Georgios A. Siviloglou,Demetrios N. Christodoulides
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2009-04-09
卷期号:324 (5924): 229-232
被引量:803
标识
DOI:10.1126/science.1169544
摘要
Plasma channel generation (or filamentation) using ultraintense laser pulses in dielectric media has a wide spectrum of applications, ranging from remote sensing to terahertz generation to lightning control. So far, laser filamentation has been triggered with the use of ultrafast pulses with axially symmetric spatial beam profiles, thereby generating straight filaments. We report the experimental observation of curved plasma channels generated in air using femtosecond Airy beams. In this unusual propagation regime, the tightly confined main intensity feature of the axially nonsymmetric laser beam propagates along a bent trajectory, leaving a curved plasma channel behind. Secondary channels bifurcate from the primary bent channel at several locations along the beam path. The broadband radiation emanating from different longitudinal sections of the curved filament propagates along angularly resolved trajectories.
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