Measurement of superluminal phase and group velocities of Bessel beams in free space

2008/11/27 by B. Braverman, Boris Braverman, K. B. Kuntz +10
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Laser-Matter Interactions and Applications #Optics (physics.optics) #Orbital Angular Momentum in Optics #physics.optics

paper · pdf · doi:10.48550/arxiv.0811.4469

3 pages, 3 figures

arxiv created 2008/11/27 · openalex publication_date 2008/11/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report on an interferometry-based measurement of the phase and group velocities of optical Bessel beams, providing confirmation of their superluminal character in the non-diffractive region. The measurements were performed in free space with a continuous wave laser and femtosecond pulses for phase and group velocities respectively. The Bessel beams were produced using a conical mirror.

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