info:eu-repo/semantics/article
Influence of the photoinduced focal length of a thin nonlinear material in the Z-scan technique
Autor
EDMUNDO REYNOSO LARA
MARCELO DAVID ITURBE CASTILLO
CARLOS GERARDO TREVIÑO PALACIOS
ERWIN JOSE ARMANDO MARTI PANAMEÑO
MAXIMINO LUIS ARROYO CARRASCO
Institución
Resumen
In this paper the response purely refractive of a thin nonlinear
material, in the z-scan technique experiment, is modeled as a lens with a
focal length that is a function of some integer power of the incident beam
radius. We demonstrate that different functional dependences of the
photoinduced lens of a thin nonlinear material give typical z-scan curves
with special features. The analysis is based on the propagation of Gaussian
beams in the approximation of thin lens and small distortion for the
nonlinear sample. We obtain that the position of the peak and valley, the
transmittance near the focus and the transmittance far from the Rayleigh
range depend on the functional dependence of the focal length. Special
values of the power reproduce the results obtained for some materials under
cw excitation.