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Acceleration of femtosecond pulses to superluminal velocities by Gouy phase shift |
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| Authors: | Z L Horváth J Vinkó Zs Bor D von der Linde |
| Institution: | (1) Department of Optics and Quantum Electronics, JATE University, P.O. Box 406, H-6701 Szeged, Hungary;(2) Research Group on Laser Physics of the Hungarian Academy of Sciences, P.O. Box 406, H-6701 Szeged, Hungary;(3) Institut für Laser- und Plasmaphysik, Universität Essen, D-45117 Essen, Germany |
| Abstract: | The phase and the group velocities are calculated in a three-dimensional neighbourhood of the focus of an aberration-free lens illuminated by a spatially Gaussian beam. The Gouy phase shift caused by the diffraction results in superluminal pulse propagation on the optical axis within the Rayleigh range. |
| Keywords: | 42 10 42 60 E |
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