Journal ArticleDOI
Can Bessel beams carry superluminal signals
Thilo Sauter,Fritz Paschke +1 more
TLDR
A critical interpretation based on the analysis of plane and spherical waves shows that the superluminal effects are caused by interference phenomena as mentioned in this paper, and demonstrates that Bessel beams or X-waves are unsuitable for superluminous signal transfer.About:
This article is published in Physics Letters A.The article was published on 2001-06-25. It has received 15 citations till now. The article focuses on the topics: Superluminal motion & Bessel beam.read more
Citations
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Journal ArticleDOI
On terahertz pulsed broadband Gauss-Bessel beam free-space propagation
TL;DR: This work has characterized two-dimensional spatio-temporal beam behavior and demonstrated all stages of pulse reshaping during the propagation, including X-shape pulse forming, as well as estimating phase velocity via propagation distance and comparing existing experimantal results.
Journal ArticleDOI
Characterization of apparent superluminal effects in the focus of an axicon lens using terahertz time-domain spectroscopy
TL;DR: In this article, the apparent superluminal velocity of an axicon lens was extracted from the peak of the time-domain waveform and also in the frequency domain by Fourier transform, and it was shown that pulse reshaping, arising from strong frequency-dependent propagation effects, does not play a substantial role.
Journal ArticleDOI
A tale of two beams: an elementary overview of Gaussian beams and Bessel beams
TL;DR: In this paper, an overview of beam solutions is presented, including Gaussian beams and Bessel-Gauss beams, which are among a class of solutions to the wave equation that are ideally diffraction free and do not diverge when they propagate.
Journal ArticleDOI
Van de Hulst Essay: A review on generalized Lorenz-Mie theories with wow stories and an epistemological discussion
TL;DR: The winner of the 2020 van de Hulst Award as mentioned in this paper has been committed to the writing of a van deHulst Essay which is presented here, and the heart of the present paper is devoted to 4 wow stories related to the development of generalized Lorenz-Mie theories.
Proceedings Article
Superluminal tunneling of optical pulses through photonic band gaps
TL;DR: Propagation of electromagnetic wave packets through 1D photonic band gap materials has been studied using 12 fs optical pulses and the measured transit time is found to be paradoxically short (implying superluminal tunneling) and independent of the barrier thickness for opaque barriers.
References
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Book
Linear and Nonlinear Waves
TL;DR: In this paper, a general overview of the nonlinear theory of water wave dynamics is presented, including the Wave Equation, the Wave Hierarchies, and the Variational Method of Wave Dispersion.
Journal ArticleDOI
Linear and Nonlinear Waves
G. B. Whitham,T. C. T. Ting +1 more
TL;DR: In this paper, a reference record was created on 2005-11-18, modified on 2016-08-08 and used for the purpose of ondes ; chocs ; onde de : choc reference record.
Journal ArticleDOI
Diffraction-free beams.
TL;DR: The first experimental investigation of nondiffracting beams, with beam spots as small as a few wavelengths, can exist and propagate in free space, is reported.
Journal ArticleDOI
Gain-assisted superluminal light propagation
TL;DR: Gain-assisted linear anomalous dispersion is used to demonstrate superluminal light propagation in atomic caesium gas and is observed to be a direct consequence of classical interference between its different frequency components in an anomalously dispersion region.