Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Pulse centroid velocity of the Poynting vector

Not Accessible

Your library or personal account may give you access

Abstract

The evolution of the pulse centroid velocity of the Poynting vector for both ultrawideband rectangular and ultrashort Gaussian envelope pulses is presented as a function of the propagation distance in a dispersive, absorptive dielectric material. The index of refraction of the material is described by the Lorentz–Lorenz formula in which a single-resonance Lorentz model is used to describe the mean molecular polarizability. The results show that, as the propagation distance increases above a value that is on the order of an absorption depth at the pulse carrier frequency, the centroid velocity of an ultrawideband/ultrashort pulse tends toward the rate at which the Brillouin precursor travels through the medium. For small propagation distances when the carrier frequency of the optical pulse lies in the absorption band of the material, the centroid velocity can take on superluminal and negative values.

© 2004 Optical Society of America

Full Article  |  PDF Article
More Like This
Numerical determination of the signal velocity in dispersive pulse propagation

Kurt E. Oughstun, Philippe Wyns, and Daniel Foty
J. Opt. Soc. Am. A 6(9) 1430-1440 (1989)

Optical precursor fields in nonlinear pulse dynamics

Chris L. Palombini and Kurt E. Oughstun
Opt. Express 18(22) 23104-23120 (2010)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (26)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved