Tunable random lasing behavior in plasmonic nanostructures
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- 作者：Ashish Yadav ; Liubiao Zhong ; Jun Sun ; Lin Jiang ; Gary J. Cheng…
- 关键词：Plasmonics ; Nanomaterials ; Scattering ; Surface plasmons and random lasing
- 刊名：Nano Convergence
- 出版年：2017
- 出版时间：December 2017
- 年：2017
- 卷：4
- 期：1
- 全文大小：1471KB
- 刊物类别：Nanotechnology; Nanoscale Science and Technology; Nanotechnology and Microengineering;
- 刊物主题：Nanotechnology; Nanoscale Science and Technology; Nanotechnology and Microengineering;
- 出版者：Korea Nano Technology Research Society
- ISSN：2196-5404
- 卷排序：4
文摘
Random lasing is desired in plasmonics nanostructures through surface plasmon amplification. In this study, tunable random lasing behavior was observed in dye molecules attached with Au nanorods (NRs), Au nanoparticles (NPs) and Au@Ag nanorods (NRs) respectively. Our experimental investigations showed that all nanostructures i.e., Au@AgNRs, AuNRs & AuNPs have intensive tunable spectral effects. The random lasing has been observed at excitation wavelength 532 nm and varying pump powers. The best random lasing properties were noticed in Au@AgNRs structure, which exhibits broad absorption spectrum, sufficiently overlapping with that of dye Rhodamine B (RhB). Au@AgNRs significantly enhance the tunable spectral behavior through localized electromagnetic field and scattering. The random lasing in Au@AgNRs provides an efficient coherent feedback for random lasers.