Reshaping of femtosecond pulses by the Gouy phase shift

Z. L. Horváth, Z. Bor

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

It is shown that because of the phase anomaly a femtosecond pulse propagates on the optical axis with a velocity greater than c in the vicinity of the focus not only for large but also small values of the Fresnel number. The group velocity is calculated and its physical meaning discussed. Analytical expressions are derived for the electric field. The causality of the system is proved. The mechanism of the superluminality is a reshaping process caused by the interference. Contrary to other superluminal phenomena, the superluminal propagation occurs in a classically not forbidden region.

Original languageEnglish
Pages (from-to)2337-2346
Number of pages10
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume60
Issue number2 B
Publication statusPublished - 1999

Fingerprint

Femtosecond Pulses
Group Velocity
Causality
Phase Shift
group velocity
Anomaly
Electric Field
phase shift
Interference
Propagation
anomalies
interference
propagation
electric fields
pulses
Meaning

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Mathematical Physics

Cite this

Reshaping of femtosecond pulses by the Gouy phase shift. / Horváth, Z. L.; Bor, Z.

In: Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 60, No. 2 B, 1999, p. 2337-2346.

Research output: Contribution to journalArticle

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