CIOP   05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
artículos
Título:
Light focusing from large refractive indices in ionized air
Autor/es:
A. ROBLEDO-MARTINEZ, H. SOBRAL, M. VILLAGRÁN-MUNIZ , F. BREDICE
Revista:
PHYSICS OF PLASMAS
Referencias:
Año: 2008 vol. 15 p. 935101 - 935108
ISSN:
1070-664X
Resumen:
The sheath that surrounds a laser-induced plasma in air was investigated with a light probe. The
sheath is a 3-mm-thick halo of ionized gas created by ultraviolet light emitted from the plasma core.
A beam of laser light tracked with a streak camera was employed to probe it. It was found that in
the first hundreds of a nanosecond after plasma inception, the beam is deflected towards the plasma
center. This result points to a high refractive index inside the sheath. The index values obtained up
to 2.0 are due to an increased susceptibility caused by a bulk electric polarization. Using previous
results on the sheaths electric polarizability values, the refractive index was calculated and was
found to agree with the observed indices. The application of the electric polarization model to the
guiding of laser beams and to plasma lenses is also discussed.up
to 2.0 are due to an increased susceptibility caused by a bulk electric polarization. Using previous
results on the sheaths electric polarizability values, the refractive index was calculated and was
found to agree with the observed indices. The application of the electric polarization model to the
guiding of laser beams and to plasma lenses is also discussed. are due to an increased susceptibility caused by a bulk electric polarization. Using previous
results on the sheaths electric polarizability values, the refractive index was calculated and was
found to agree with the observed indices. The application of the electric polarization model to the
guiding of laser beams and to plasma lenses is also discussed.