等离激元纳米贴片天线耦合MEH-PPV超薄膜的高亮快速发射  

Bright and fast emission of MEH-PPV ultrathin film by plasmonic nanopatch antenna coupling

作　　者：刘莹[1] 张曼曼 王珍珍[1] 李浩宇 孟献瑞 房晓敏[1] 张文凯[1] LIU Ying;ZHANG Manman;WANG Zhenzhen;LI Haoyu;MENG Xianrui;FANG Xiaomin;ZHANG Wenkai(College of Chemistry and Molecular Sciences,Henan University,Kaifeng 475004,Henan,China)

机构地区：[1]河南大学化学与分子科学学院,河南开封475004

出　　处：《化学研究》2023年第5期398-404,共7页Chemical Research

基　　金：This work was supported by the International Cooperation Project of Science and Technology Research Plan of Henan Province(232102521020);2023 Innovation and Entrepreneurship Training Program of Henan University(20222401240)。

摘　　要：作为一类潜在的纳米光源,共轭聚合物薄膜的荧光寿命通常在1~10 ns的范围内,这阻碍了其在高速光子器件中的应用。本文实现了等离激元纳米贴片天线(NPA)耦合聚[2-甲氧基-5-(2-乙基己氧基)-1,4-苯基乙烯基](MEH-PPV)薄膜的高亮、快速发射,其中11 nm厚的聚(二烯丙基二甲基氯化铵)/聚苯乙烯磺酸钠(PDDA/PSS)n多层自组装膜用作介质层来调节等离激元微腔的损耗特性。实验结果表明,MEH-PPV超薄膜的发射强度增强了1.9倍,而辐射速率增加了7.2倍。以上结果为开发基于MEH-PPV聚合物薄膜的高速光子源提供了理论依据。As a potential nanophotonic source,the conjugated polymer film typically has long emission lifetimes at the scale of 1-10 ns,which is an obstacle for high-speed photonic devices.Herein,we demonstrate a fast and bright emission of poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene](MEH-PPV)coupled to a plasmonic nanopatch antenna(NPA),in which the layer-by-layer assembled poly(diallyldimethylammonium)(PDDA)/poly(styrenesulfonate)(PSS)polyelectrolyte film is used as a 11 nm-thick spacer to regulate the lossy characteristics of the plasmonic cavity.We show that the emission intensity of the MEH-PPV film is enhanced by 1.9 times,and the emission rate is increased by a factor of 7.2.These results are useful for exploring the MEH-PPV film as a high-speed photonic source.

关 键 词：等离激元 纳米天线 荧光 共轭聚合物 

分 类 号：O69[理学—化学]