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Abstract

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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This work was supported by the U.S. Air Force Office of Scientific Research through grants FA9550-07-1-0010 and FA9550-07-1-0256. The contribution of G.A.S. and D.N.C. was partially supported by Lockheed Martin Corporation. We thank T.-M. O. Crust for stimulating discussions and D. Hansen and T. Milster for fabricating cubic phase masks used in the experiments.

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Published In

Science
Volume 324 | Issue 5924
10 April 2009

Submission history

Received: 9 December 2008
Accepted: 23 February 2009
Published in print: 10 April 2009

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Notes

Supporting Online Material
www.sciencemag.org/cgi/content/full/324/5924/229/DC1
Materials and Methods
SOM Text
References

Authors

Affiliations

Pavel Polynkin* [email protected]
College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA.
Miroslav Kolesik
College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA.
Jerome V. Moloney
College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA.
Department of Mathematics, University of Arizona, Tucson, AZ 85721, USA.
Georgios A. Siviloglou
Center for Research and Education in Optics and Lasers–College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA.
Demetrios N. Christodoulides
Center for Research and Education in Optics and Lasers–College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA.

Notes

*
To whom correspondence should be addressed. E-mail: [email protected]

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