Munkhbat Battulga, Ziegler Johannes, Pöhl Hannes, Wörister Christian, Sivun Dmitry, Scharber Markus C, Klar Thomas A, Hrelescu Calin
Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
J Phys Chem C Nanomater Interfaces. 2016 Oct 20;120(41):23707-23715. doi: 10.1021/acs.jpcc.6b05737. Epub 2016 Oct 4.
Here, we report that hybrid multilayered plasmonic nanostars can be universally used as feedback agents for coherent random lasing in polar or nonpolar solutions containing gain material. We show that silver-enhancement of gold nanostars reduces the pumping threshold for coherent random lasing substantially for both a typical dye (R6G) and a typical fluorescent polymer (MEH-PPV). Further, we reveal that the lasing intensity and pumping threshold of random lasers based on silver-enhanced gold nanostars are not influenced by the silica coating, in contrast to gold nanostar-based random lasers, where silica-coated gold nanostars support only amplified spontaneous emission but no coherent random lasing.
在此，我们报道混合多层等离子体纳米星可普遍用作含增益材料的极性或非极性溶液中相干随机激光发射的反馈剂。我们表明，金纳米星的银增强作用显著降低了典型染料（R6G）和典型荧光聚合物（MEH-PPV）的相干随机激光发射的泵浦阈值。此外，我们发现，与基于金纳米星的随机激光器不同，基于银增强金纳米星的随机激光器的激光强度和泵浦阈值不受二氧化硅涂层的影响，在基于金纳米星的随机激光器中，二氧化硅包覆的金纳米星仅支持放大的自发发射，而不支持相干随机激光发射。
