标题： 表面碰撞对金属纳米颗粒附近发光增强和猝灭的影响 显示英文标题

标题： Impact of surface collisions on enhancement and quenching of the luminescence near the metal nanoparticles

摘要： 表面诱导的金属纳米颗粒中表面等离激元极化子（SPPs）的阻尼率随着粒子尺寸的减小而增加是众所周知的。我们表明，该阻尼率也随着模式约束程度的增加而增加，因此球形颗粒中高阶非辐射SPP模式的阻尼相对于基本（偶极子）SPP模式的阻尼大大增强。由于高阶模式是导致金属表面附近发光猝灭的原因，因此猝灭程度增加，导致可获得的发光增强量显著减少。 显示英文摘要

摘要： The fact that surface-induced damping rate of surface plasmon polaritons (SPPs) in metal nanoparticles increases with the decrease of particle size is well known. We show that this rate also increases with the degree of the mode confinement, hence damping of the higher order nonradiative SPP modes in spherical particles is greatly enhanced relative to damping of the fundamental (dipole) SPP mode. Since higher order modes are the ones responsible for quenching of luminescence in the vicinity of metal surfaces, the degree of quenching increases resulting in a substantial decrease in the amount of attainable enhancement of the luminescence