等离激元去相位时间的调控研究进展

Research Progress of Modification the Plasmon Dephasing Time

等离激元是金属表面的自由电子与入射光子相互作用时形成的一种电磁波模式,等离激元在应用中的性能与等离激元的阻尼密切相关。等离激元的去相位时间是评价阻尼的重要参数,精确的测量及操纵去相位时间是等离激元在未来应用发展的先决条件。本文给出了改变纳米结构材料、结构尺寸、入射光源、等离激元模式及耦合作用等条件实现对金属纳米结构中等离激元场去相位时间调控的相关研究。本文所述内容有助于人们对等离激元动力学演化过程作进一步理解,为等离激元在超快光开关等领域的应用奠定基础。

Plasmon is an electromagnetic wave pattern formed when free electrons on a metal surface interact with incident photons. The performance of a plasmon in an application is closely related to the damping of the plasmon. The dephasing time of the plasmon is an important parameter for evalu-ating the damping. Accurate measurement and manipulation of the dephasing time are prerequi-sites for the development of plasmons in future applications. This paper presents the related re-search on changing the conditions of nanostructured materials, structure size, incident light source, plasmon mode, and coupling effect to control the dephasing time of plasmon field in metal nanostructures. The content described in this article will help people to further understand the dynamic evolution process of plasmon, and lay the foundation for the application of plasmon in the field of the ultrafast optical switches.