LARGE NONLINEAR ABSORPTION IN C-60 THIN-FILMS

Citation
G. Gu et al., LARGE NONLINEAR ABSORPTION IN C-60 THIN-FILMS, Journal of physics. B, Atomic molecular and optical physics, 26(15), 1993, pp. 451-455
Citations number
11
Language
INGLESE
art.tipo
Letter
Categorie Soggetti
Physics, Atomic, Molecular & Chemical",Optics
ISSN journal
0953-4075
Volume
26
Issue
15
Year of publication
1993
Pages
451 - 455
Database
ISI
SICI code
0953-4075(1993)26:15<451:LNAICT>2.0.ZU;2-2
Abstract
The non-linear absorption coefficients of C60 thin films at 633 nm wer e measured with the absolute measurement and the Z-scan method, respec tively. Both measurements yield a large non-linear absorption coeffici ent beta = 4.4 cm W-1 and 8.0 cm W-1. A thermal self-focusing focusing effect was also observed. The possible mechanisms of the larger non-l inear absorption were discussed. We predict that C60 thin film may be a good optical limiter for a continuous wave (cw) laser.