金银核壳纳米棒等离子激元共振增强有机激光（宁舒雅 Optics Letter 40（2015）990–993）
- 发布时间：
- 2015-01-29
- 文章标题：
- 金银核壳纳米棒等离子激元共振增强有机激光（宁舒雅 Optics Letter 40（2015）990–993）
- 内容：
Enhanced Lasing assisted by the Ag-encapsulated Au plasmonic nanorods
Shuya Ning, Zhaoxin Wu*, Hua Dong, Fang Yuan, Jun Xi, Lin Ma, Bo Jiao, and Xun Hou
Key Laboratory of Photonics Technology for Information, Department of Electronic Science and technology, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, 710049, PR China.
*Corresponding author: zhaoxinwu@mail.xjtu.edu.cn
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(Alq3) and 4- (dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB), which are 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.