Optical limiting properties of a zinc porphyrin polymer and its dimer and monomer model compounds

被引：88
作者：
Qureshi, FM
Martin, SJ
Long, X
Bradley, DDC
Henari, FZ
Blau, WJ
Smith, EC
Wang, CH
Kar, AK
Anderson, HL
机构：
[1] Univ Sheffield, Ctr Mol Mat, Sheffield S3 7RH, S Yorkshire, England
[2] Univ Sheffield, Dept Phys, Sheffield S3 7RH, S Yorkshire, England
[3] Univ Dublin Trinity Coll, Dept Phys, Dublin 2, Ireland
[4] Heriot Watt Univ, Dept Phys, Edinburgh EH14 4AS, Midlothian, Scotland
[5] Univ Oxford, Dyson Perrins Lab, Oxford OX1 3QY, England
来源：
CHEMICAL PHYSICS | 1998年 / 231卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
D O I：
10.1016/S0301-0104(98)00081-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report on the strong decrease in laser light transmission with increasing excitation intensity observed in thin films of a zinc porphyrin polymer and its dimer and monomer model compounds. Nonlinear transmission measurements performed at 532 nm using 500 ps laser pulses show decreases of 40%, 60% and 65% at input fluences of 0.01 J/cm(2) for the monomer, dimer and polymer thin films, respectively. Its application as an optical limiting device for the protection of the eyes and optical sensors from high-fluence laser pulses is assessed. Additional pump-probe measurements performed at 595 nm using 0.8 ps excitation allow us to discuss the strong response in terms of a six-level model of the electronic structure. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：87 / 94
页数：8
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