表面等离子体激元的原理与应用

Principles and Applications of Surface Plasmon Polaritons

摘要:

光与物质之间的相互作用，被视为光学应用的最基础物理问题。由光与凝聚态物质之间的相互作用形成的表面等离子体激元（Surface Plasmon Polaritons, SPPs），是一种新型的元激发准粒子，因其具有独特的色散和局域场增强特性引起广泛关注。SPPs器件打破了传统光学衍射限制，在纳米光子器件中有独特优势，应用于微纳光子学的前沿研究。阐述了SPPs的色散关系、激发方式、传播形式和物理性质，重点探讨了SPPs在波导、近场光学、传感器、生物医疗、光子芯片、表面增强拉曼散射和太阳能电池等方面的应用，并提出了研究前景。

Abstract:

The interaction between light and matter has always been of interest to researchers and is regarded as the most fundamental physical problem related to various optical applications. In this regard， a new type of meta-excited quasiparticles， surface plasmon polaritons （SPPs）， which are formed by the interaction between light and condensed matter， have begun to emerge as a new type of quasiparticles due to their unique dispersion and local-field enhancement properties. SPPs devices break the traditional optical diffraction limitations and show their unique and significant advantages in nanophotonic devices， which are widely used in the frontiers of micro- and nanophotonics research. The paper briefly describes the dispersion relation， excitation mode， propagation form and physical properties of SPPs， focuses on the applications of SPPs in waveguides， near-field optics， sensors， biomedicine， photonic chips， surface-enhanced Raman scattering and solar energy， and looks forward to the potential applications and research prospects of SPPs.