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Large ultrafast nonlinear optical response and excellent optical limiting behaviour in pyrene-conjugated zinc(II) phthalocyanines at a near-infrared wavelength
Dyes and Pigments ( IF 4.5 ) Pub Date : 2020-08-30 , DOI: 10.1016/j.dyepig.2020.108787
Ali Husain , Asaithampi Ganesan , Mathew Sebastian , Saad Makhseed

The design and synthesis with full structural utilization of a new type of nonlinear photonic material, Zinc(II) phthalocyanine macrocycle (Pc-pyrene), bearing binary oriented (up/down) pyrene units is reported. The novel pyrene-based macrocycle has been successfully obtained in high yield upon coupling multiple azido pyrene derivatives on a previously fabri-cated alkynyl-substituted macrocyclic platform (Pc1) via multiple tandem Cu(I)-catalysed azide-alkyne cycloaddition (CuAAC) reactions. The ultrafast nonlinear optical characteristics of both Pc1 and Pc-pyrene have been investigated in solution using a near-infrared femtosecond pulsed laser. The femtosecond Z-scan results reveal a low optical limiting threshold and a good set of figures of merit that make these macrocycles feasible for optical limiting as well as switching applications. In a major breakthrough, ultrafast laser-induced deformations in Pc-pyrene-embedded PMMA films results in a very large enhancement of the three-photon absorption coefficient at 800 nm by up to ~105 times that of Pc solutions. Furthermore, the deformed Pc-pyrene PMMA films having the advantage of flexibility and possess an excellent optical limiting threshold (0.0018 J/cm2), much lower than various previously reported values, which enables them to be one of the best optical limiters.



中文翻译:

fast共轭锌(II)酞菁类化合物在近红外波长下的大超快非线性光学响应和出色的光学限制行为

报道了具有二元取向(上/下)pyr单元的新型非线性光子材料锌(II)酞菁大环(Pc-py)的设计和合成。通过将多个叠氮基has衍生物通过预先制备的炔基取代的大环平台(Pc1)偶联,成功地高收率地获得了新型的pyr基大环化合物多个串联的Cu(I)催化的叠氮化物-炔烃环加成(CuAAC)反应。使用近红外飞秒脉冲激光在溶液中研究了Pc1和Pc-py的超快非线性光学特性。飞秒Z扫描结果显示出较低的光学限制阈值和良好的品质因数集,使这些大循环对于光学限制和开关应用而言是可行的。一项重大突破是,在嵌入Pc-py的PMMA薄膜中超快激光诱导的形变导致800 nm处的三光子吸收系数大大提高,最多是Pc溶液的约10 5倍。此外,变形的Pc-py PMMA薄膜具有柔韧性的优点,并具有出色的光学极限阈值(0.0018 J / cm2),远低于以前报告的各种值,这使其成为最佳的光学限制器之一。

更新日期:2020-09-11
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