Title :
Nonlinear refractive indices of polystyrene films doped with azobenzene dye Disperse Red 1
Author :
Mendonca, C.R. ; Costa, Maxwell M. ; Giacometti, J.A. ; Nunes, Fernando D. ; Zilio, S.C.
Author_Institution :
Dept. de Fisica e Ciencia dos Mater., Sao Paulo Univ.
fDate :
1/8/1998 12:00:00 AM
Abstract :
Nonlinear refractive indices of polystyrene films containing azobenzene dye Disperse Red 1 (DR1) have been measured as a function of wavelength using the single beam Z-scan technique with a Fourier analysis of the transmittance time evolution. Although the C.W. excitation is carried out far from the absorption resonance region, the large nonlinear optical response has its origin in a thermal effect. We were able to find the thermal diffusivity coefficient of the sample
Keywords :
Fourier analysis; nonlinear optics; polymer films; refractive index; Disperse Red 1; Fourier analysis; azobenzene dye; nonlinear optical response; nonlinear refractive indices; polystyrene films; single beam Z-scan technique; thermal diffusivity coefficient; thermal effect; transmittance time evolution;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19980010
