Direct measurement of an electric field in femtosecond Bessel–Gaussian beams

Abstract

We demonstrated the mapping of the spatial oscillation of electric fields in the transverse plane of a femtosecond Bessel–Gaussian laser beam from the first principle of classical electrodynamics. An attosecond burst of electrons for probing the electric force was placed in the Bessel beam through photoemission with single isolated $276\text{\hspace{0.17em} as}$ extreme ultraviolet pulses. The direction reversal of the electric field in adjacent Bessel rings was directly confirmed by observing the momentum shift of the probe electrons.

© 2009 Optical Society of America

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