中文摘要：

局域表面等离激元使得贵金属纳米颗粒具有丰富的光学性质，其应用涵盖能源、生物医学、安全、信息、超材料等诸多领域。文章简要介绍局域表面等离激元的基本性质、贵金属纳米结构中的局域表面等离激元共振耦合以及具有局域表面等离激元特性的贵金属纳米结构的一些重要应用。

英文摘要：

Noble metal nanostructures possess rich optical properties due to their localized surface plasmon resonances, which can be excited by electromagnetic waves. Their unique plasmonic properties can be employed in various applications, such as renewable energy, biomedical science, national security, food safety, information technology, and metamaterials. In this article, we briefly review the properties of localized surface plasmons, plasmon coupling in noble metal nanostructures, and some of their important applications.