Optical limiting in the red-NIR range with soluble two-photon absorbing molecules

被引：72
作者：
Silly, MG
Porrès, L
Mongin, O
Chollet, PA
Blanchard-Desce, M
机构：
[1] Univ Rennes 1, CNRS UMR 6510, Inst Chim, F-35042 Rennes, France
[2] CEA Saclay, SE2M, DECS,LIST, DRT,Lab Composants Organ, F-91191 Gif Sur Yvette, France
来源：
CHEMICAL PHYSICS LETTERS | 2003年 / 379卷 / 1-2期
关键词：
D O I：
10.1016/j.cplett.2003.08.017
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：
Two-photon absorbing chromophores were designed and investigated for optical power limitation based on multiphoton absorption processes. These molecules combine very large two-photon absorption cross-sections (with typical sigma(2p) maximum values of 3 x 10(-20) cm(4) GW(-1) at 735 nm) and large excited-state cross-sections (with typical maximum sigma(e) values of 5 x 10(-16) cm(2)) in the red-NIR region, as shown by two-photon-excited fluorescence and pump-probe Kerr ellipsometry experiments. Numerical simulations demonstrate that these chromophores show a strongly nonlinear absorption behavior suitable for optical limiting of ns pulses (with threshold values down to 1.5 x 10(-2) J cm(-2) for 0.55 ns pulses). (C) 2003 Elsevier B.V. All rights reserved.
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页码：74 / 80
页数：7
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