Intermixed light-matter quasi-particles-polaritons-have unique optical properties owing to their compositional nature. These intriguing hybrid states have been extensively studied over the past decades in a wide range of realizations aiming at both basic science and emerging applications. However, recently, it has been demonstrated that not only optical but also material-related properties, such as chemical reactivity and charge transport, may be significantly altered in the strong coupling regime of light-matter interactions. We show that a nanoscale system, composed of a plasmonic nanoprism strongly coupled to excitons in a J-aggregated form of organic chromophores, experiences modified excited-state dynamics and, therefore, modified photochemical reactivity. Our experimental results reveal that photobleaching, one of the most fundamental photochemical reactions, can be effectively controlled and suppressed by the degree of plasmon-exciton coupling and detuning. In particular, we observe a 100-fold stabilization of organic dyes for the red-detuned nanoparticles. Our findings contribute to understanding of photochemical properties in the strong coupling regime and may find important implications for the performance and improved stability of optical devices incorporating organic dyes.

中文翻译：

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通过强烈耦合到等离子体纳米天线抑制有机发色团的光氧化。

混合光物质准粒子极化子由于其组成性质而具有独特的光学性质。在过去的几十年中，针对基础科学和新兴应用，对这些有趣的混合状态进行了广泛的研究。然而，近来已证明，不仅光的性质而且与材料有关的性质，例如化学反应性和电荷传输，在光-物质相互作用的强耦合机制中也可能被显着改变。我们表明，由等离激元纳米棱镜与激子以有机材料生色团的J聚集形式强烈耦合的激子组成的纳米尺度系统，经历了修改的激发态动力学，因此，修改了光化学反应性。我们的实验结果表明，光漂白，最基本的光化学反应之一，可以通过等离激子-激子耦合和失谐的程度得到有效控制和抑制。尤其是，我们观察到红色失谐纳米粒子的有机染料具有100倍的稳定性。我们的发现有助于理解强耦合机制中的光化学性质，并可能对掺入有机染料的光学器件的性能和改进的稳定性具有重要意义。