Picosecond reverse saturable absorption and optical limiting in fullerenes and their metal derivatives

被引:21
作者
Callaghan, J [1 ]
Blau, WJ [1 ]
机构
[1] Univ Dublin Trinity Coll, Dept Phys, Mat Ireland Polymer Res Ctr, Dublin 2, Ireland
来源
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS | 2000年 / 9卷 / 04期
关键词
D O I
10.1142/S0218863500000339
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Investigations of the reverse saturable absorption behaviour of Fullerenes C-60 and C-70 and some of their Pt and Pd metal derivatives have been carried out with picosecond pulses at 532 nm. From intensity dependent transmission measurements, coupled with a population level kinetic analysis, excited state cross sections were determined for the materials. These show that C-60 possesses the largest excited state to ground state cross-section ratio and that, of the materials studied, it offers the best optical limiting ability around 532 nm. C-70, due to its large ground state absorption, has been shown not to be an efficient limiter. The metal derivatives perform better than C-70 but less efficiently than C-60.
引用
收藏
页码:505 / 521
页数:17
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