Enhanced lasing assisted by the Ag-encapsulated Au plasmonic nanorods
Enhanced lasing assisted by the Ag-encapsulated Au plasmonic nanorods
复制标题
银封装金等离子体纳米棒辅助增强激光发射
DOI：
10.1364/ol.40.000990
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发表时间：
2015-03-15
期刊：
影响因子：
3.6
通讯作者：
Hou, Xun
中科院分区：
文献类型：
--
作者：
Ning, Shuya;Wu, Zhaoxin;Hou, Xun
据报道，在银封装的Au纳米棒（Au@Ag NR）的辅助下，波导随机激光的阈值降低和发射增强。三（8-羟基喹啉）铝（Alq（3））和4-（二氰基亚甲基）-2-叔丁基-6-（1，1，7，7-四甲基久洛烷基-9-烯基）-4H-吡喃（DCJTB）的共混物构成了典型的给体-受体激光系统，被用作增益介质。与Ag纳米颗粒和Au纳米棒相比，Au@Ag纳米棒具有较宽的局域表面等离子体共振（LSPR）吸收光谱，且吸收光谱与增益介质的施主-受主系统的吸收光谱和发射光谱有很好的重叠。Au@Ag纳米棒的这种独特的等离子体特性导致了较低的激光阈值，并通过增强局域电磁场和散射的作用提高了激光效率。(C)2015美国光学学会
Threshold reduction and emission enhancement were reported for the waveguided random lasing, assisted by the Ag-encapsulated Au nanorods (Au@Ag NRs). The blend of tris(8-hydroxyquinolinato)aluminum (A lq(3)) and 4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4 H-pyran (DCJTB), which comprise the typical donor-acceptor lasing system, is used as the gain media. Compared with the Ag nanoparticles and Au nanorods, Au@Ag NRs exhibited the broad absorption spectra of localized surface plasmon resonance (LSPR) with multiple peaks, which sufficiently overlapped with both absorption and emission spectra of the donor-acceptor system of the gain media. This unique plasmonic characteristic of Au@Ag NRs leads to the lower lasing threshold and enhances the lasing efficiency by the effects of both enhancement of localized electromagnetic field and scattering. (C) 2015 Optical Society of America