On the basis of Rayleigh-Sommerfeld vectorial diffraction formulas, we show that the radiation from a pulsed Gaussian planar source propagates at a slightly superluminal group velocity beyond the Rayleigh distance, in agreement with a recent prediction from the approximate paraxial theory of diffraction. Moreover, superluminality can be sizably enhanced up to velocities 1.5% faster than c (speed of a plane wave in vacuum) by diminishing the diameter of the source down to one wavelength. (C) 2002 Elsevier Science B.V. All rights reserved.

Porras MA, Borghi R, & Santarsiero M (2002). Superluminality in Gaussian beams. OPTICS COMMUNICATIONS, 203(3-6), 183-189 [10.1016/S0030-4018(02)01173-2].

Superluminality in Gaussian beams

BORGHI, Riccardo;Santarsiero M.
2002

Abstract

On the basis of Rayleigh-Sommerfeld vectorial diffraction formulas, we show that the radiation from a pulsed Gaussian planar source propagates at a slightly superluminal group velocity beyond the Rayleigh distance, in agreement with a recent prediction from the approximate paraxial theory of diffraction. Moreover, superluminality can be sizably enhanced up to velocities 1.5% faster than c (speed of a plane wave in vacuum) by diminishing the diameter of the source down to one wavelength. (C) 2002 Elsevier Science B.V. All rights reserved.
Porras MA, Borghi R, & Santarsiero M (2002). Superluminality in Gaussian beams. OPTICS COMMUNICATIONS, 203(3-6), 183-189 [10.1016/S0030-4018(02)01173-2].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/133232
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