The study of strong coupling between light and matter has gained significant attention in recent years due to its potential applications in diverse fields, including artificial light harvesting, ultraefficient polariton lasing, and quantum information processing. Plasmonic cavities are a compelling alternative of conventional photonic resonators, enabling ultracompact polaritonic systems to operate at room temperature. This review focuses on colloidal metal nanoparticles, highlighting their advantages as plasmonic cavities in terms of their facile synthesis, tunable plasmonic properties, and easy integration with excitonic materials. We explore recent examples of strong coupling in single nanoparticles, dimers, nanoparticle-on-a-mirror configurations, and other types of nanoparticle-based resonators. These systems are coupled with an array of excitonic materials, including atomic emitters, semiconductor quantum dots, two-dimensional materials, and perovskites. In the concluding section, we offer perspectives on the future of strong coupling research in nanoparticle systems, emphasizing the challenges and potentials that lie ahead. By offering a thorough understanding of the current state of research in this field, we aim to inspire further investigations and advances in the study of strongly coupled nanoparticle systems, ultimately unlocking new avenues in nanophotonic applications.

中文翻译：

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等离激元金属纳米粒子的强耦合

近年来，光与物质之间的强耦合研究因其在人造光采集、超高效极化激元激光和量子信息处理等不同领域的潜在应用而受到广泛关注。等离子体腔是传统光子谐振器的一种引人注目的替代品，使超紧凑的极化子系统能够在室温下运行。本综述重点关注胶体金属纳米颗粒，强调了它们作为等离子体腔的优势，包括易于合成、可调谐等离子体特性以及易于与激子材料集成。我们探索了单纳米颗粒、二聚体、镜子上纳米颗粒配置和其他类型的基于纳米颗粒的谐振器中强耦合的最新示例。这些系统与一系列激子材料耦合，包括原子发射体、半导体量子点、二维材料和钙钛矿。在结论部分，我们对纳米颗粒系统强耦合研究的未来提出了看法，强调了未来的挑战和潜力。通过对该领域研究现状的全面了解，我们的目标是激发强耦合纳米颗粒系统研究的进一步研究和进展，最终开辟纳米光子应用的新途径。