Competition of Third- and Fifth-Order Non-linear Optical Processes in C60 Thin Film

The non-linear refractive processes due to the third- and fifth-order non-linearities in fullerene thin films were investigated using the Z-scan technique (λ=532 nm, t=55 ps). The analysis of the simultaneous influence of the third-order non-linear refraction causing the self-focusing and fifth-orde...

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Bibliographic Details
Published in:Fullerenes, nanotubes, and carbon nanostructures nanotubes, and carbon nanostructures, 2005-04, Vol.13 (2), p.131-140
Main Authors: Ryasnyansky, A. I., Ganeev, R. A., Redkorechev, V. I., Usmanov, T., Priebe, G., Fostiropoulos, K.
Format: Article
Language:English
Subjects:
fullerene
Non-linear optics
refraction
Online Access:Get full text
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Summary:The non-linear refractive processes due to the third- and fifth-order non-linearities in fullerene thin films were investigated using the Z-scan technique (λ=532 nm, t=55 ps). The analysis of the simultaneous influence of the third-order non-linear refraction causing the self-focusing and fifth-order nonlinear refraction causing the self-defocusing was carried out. It is shown that at low intensities (up to 5×10 8  W cm −2 ) the non-linear refraction process was determined by the only third-order process, while at intensity increase both influence of the third- and the fifth-order processes was observed. The origin of observed non-linearities was analyzed.
ISSN:1536-383X
1536-4046
DOI:10.1081/FST-200050689