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Anomalous Lasing Behavior in a Nonlinear Plasmonic Random Laser
ACS Photonics ( IF 6.5 ) Pub Date : 2025-01-24 , DOI: 10.1021/acsphotonics.4c01578
Renu Yadav, Sourabh Pal, Subhajit Jana, Samit K. Ray, Maruthi M. Brundavanam, Shivakiran Bhaktha B. N

Plasmonic random lasers involve the interaction of emitters and metallic scatterers in extremely small mode volumes, which give rise to interesting nonlinear optical phenomena in random nanocavities. Here, we present an anomalous lasing behavior in a plasmonic random laser composed of vertically standing ZnO nanorods decorated with Au nanoislands and infiltrated with a dye-doped polymer matrix. The coupling of random laser modes to plasmonic nanocavities with high absorption losses results in unusual lasing behavior. At higher pump fluences, the nonlinear optical behavior of the Au nanoislands induces a second kink in the threshold characteristics. Various statistical tools have been employed to analyze the intensity fluctuations of the random laser modes, validating this unique lasing behavior.

中文翻译:


非线性等离子体随机激光器中的异常激光闪烁行为



等离子体随机激光器涉及发射器和金属散射体在极小的模式体积中的相互作用,这在随机纳米腔中产生了有趣的非线性光学现象。在这里,我们展示了等离子体随机激光器中的异常激光行为,该激光由垂直站立的 ZnO 纳米棒组成,这些纳米棒装饰有 Au 纳米岛,并浸润有染料掺杂聚合物基质。随机激光模式与具有高吸收损失的等离子体纳米腔的耦合导致不寻常的激光行为。在较高的泵浦通量下,Au 纳米岛的非线性光学行为会在阈值特性中引起第二次扭结。已经使用了各种统计工具来分析随机激光模式的强度波动,验证了这种独特的激光行为。
更新日期:2025-01-25
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