摘要
阴极荧光是材料在受到电子束激发时产生的光学信号,具有微区激发和超高空间分辨的特点.本文首先介绍了阴极荧光的物理机理,描述了传统的实验探测手段和实验装置,随后利用阴极荧光光谱技术研究了金纳米圆盘在电子束激发下的局域表面等离激元共振模式,并结合数值模拟说明了本征电磁模式随着圆盘半径的演化以及对发光偏振特性的影响.
Cathodoluminescence(CL)is an optical signal generated from a material excited by an electron beam,which has the characteristics of micro-area excitation and ultra-high spatial resolution.This paper firstly introduced the physical mechanism of cathodoluminescence,briefly described the traditional experimental detection means and experimental devices,and then used CL spectroscopy to study the local surface plasmon resonance modes of gold nanodisks under electron beam excitation.And combined with numerical simulation,the intrinsic electromagnetic modes with the evolution of the disk radius and the influence on the luminescence polarization characteristics were explained.
作者
张晗
党郅博
方哲宇
ZHANG Han;DANG Zhibo;FANG Zheyu(School of Physics,Peking University,Beijing 100871,China;State Key Laboratory of Artificial Microstructure and Mesoscopic Physics,Peking University,Beijing 100871,China)
出处
《物理实验》
2023年第9期1-7,共7页
Physics Experimentation
基金
国家自然科学基金项目(No.62225501,No.12027807)
国家重点研发计划项目(No.2020YFA0211300)。
关键词
电子束
阴极荧光
纳米结构
等离激元
electron beam
cathodoluminescence
nanostructure
plasmon
