阴极荧光在表面等离激元研究领域的应用
发布时间：2018-01-31 05:16
本文关键词： 阴极荧光 表面等离激元 亚波长 金属纳米结构 出处：《物理学报》2017年14期 论文类型：期刊论文
【摘要】：表面等离激元以其独特的光学性质广泛应用于纳米尺度的局域电磁场增强、超高分辨成像及微弱光电探测.阴极荧光是电子与物质相互作用而产生的光学响应,利用电子束激发金属纳米结构能够实现局域等离激元共振,并在亚波长尺度实现对共振模式的调控,具有超高空间分辨的成像特点.阴极荧光探测通常结合扫描电子显微镜或透射电子显微镜而实现,目前己被应用于表面等离激元的探测及共振模式的分析.本文从阴极荧光物理机理出发,综述了单一金属纳米结构和金属耦合结构的等离激元共振模式阴极荧光研究进展,并总结了阴极荧光与角分辨、时间分辨以及电子能量损失谱等关键技术相结合的应用,进一步分析了其面临的关键问题,最后展望了阴极荧光等离激元研究方向.
[Abstract]:Surface isoexcitators are widely used in nanoscale local electromagnetic field enhancement, ultra-high resolution imaging and weak photoelectric detection due to their unique optical properties. Cathode fluorescence is the optical response caused by the interaction between electrons and matter. Using electron beam to excite the metal nanostructures can realize the local isobaric resonance and control the resonance mode at the sub-wavelength scale. Cathode fluorescence detection is usually realized by combining scanning electron microscope (SEM) or transmission electron microscope (TEM). At present, it has been applied to the detection of surface isoexcitators and the analysis of resonance modes. In this paper, we proceed from the physical mechanism of cathodic fluorescence. In this paper, the research progress of single metal nanostructure and metal coupling structure in isoexciton resonant mode cathodoluminescence is reviewed, and the cathodic fluorescence and angular resolution are also summarized. With the application of time resolution and electron energy loss spectroscopy, the key problems are analyzed. Finally, the research direction of cathode fluorescence isopherons is prospected.
【作者单位】： 北京大学物理学院人工微结构和介观物理国家重点实验室;
【基金】：国家重点基础研究发展计划(批准号:2017YFA0205700,2015CB932403,2017YFA0206000) 国家自然科学基金(批准号:61422501,11674012,11374023,61176120,61378059,61521004) 北京市自然科学基金(批准号:L140007) 教育部全国优秀博士学位论文专项基金(批准号:201420)资助的课题~~
【分类号】：O441;TB383.1
【正文快照】： 1引言 类似于光和物质的相互作用,当电子入射到物质表面时,其较T嫉哪芰靠梢越镏驶缱蛹し⒌礁吣芗，
本文编号：1478300
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