Strong light–matter interactions have received a lot of attention, for example in the pursuit of plasmonic-excitonic structures as coherent light sources with low-power threshold. In this study, we investigate the influence of room temperature strong coupling between surface plasmon polaritons (SPP) and excitons on fluorescence lifetimes and photobleaching effects. Our plasmonic-photonic structure, comprising of thin silver (Ag) and gold (Au) layers with a Rhodamine 6G (R6G) dye layer, shows a clear shift in the plasmon resonance and R6G absorption lines with varying incident angles, indicative of strong coupling, with a measured Rabi splitting of approximately 90 meV. Fluorescence lifetime imaging microscopy (FLIM) was then employed to assess photobleaching, revealing a significant reduction in photobleaching effect for in strongly coupled plasmonic-excitonic structures compared to single Rhodamine R6G layers. Our findings indicate the pivotal role of strong light–matter interactions in reducing photobleaching effects and stabilizing fluorescence intensities, offering promising avenues for developing quantum multiparticle nanophotonic devices with enhanced stability and performance.

中文翻译：

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用于光漂白抑制的强耦合等离子体激子极化激元


强光与物质的相互作用受到了广泛的关注，例如在追求等离子体激子结构作为低功率阈值的相干光源时。在这项研究中，我们研究了表面等离子体激元（SPP）和激子之间的室温强耦合对荧光寿命和光漂白效应的影响。我们的等离子体光子结构由薄银 (Ag) 和金 (Au) 层以及罗丹明 6G (R6G) 染料层组成，在不同入射角下等离子体共振和 R6G 吸收线显示出明显的偏移，表明强耦合，测得的拉比分裂约为 90 meV。然后采用荧光寿命成像显微镜 (FLIM) 来评估光漂白，结果表明与单罗丹明 R6G 层相比，强耦合等离子体激子结构的光漂白效应显着降低。我们的研究结果表明，强光-物质相互作用在减少光漂白效应和稳定荧光强度方面发挥着关键作用，为开发具有增强稳定性和性能的量子多粒子纳米光子器件提供了有前景的途径。