等离子体纳米粒子的热电子光发射:瞬态吸收在表面机制中的作用

2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Pub Date : 2014-11-06 DOI:10.1109/METAMATERIALS.2014.6948547

A. Uskov, I. Protsenko, R. Ikhsanov, Viktoriia E. Babicheva, S. Zhukovsky, A. Lavrinenko, E. O’Reilly, Hongxing Xu

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引用次数: 0

摘要

我们分析和比较了球形纳米颗粒的表面和体积内部光电效应，得到了两种情况下光电发射率的解析表达式。与平坦金属表面的结果类似，可以表明表面机制占上风，因为它不受有害的热电子碰撞的影响。瞬态吸收是由于纳米粒子边界的介电常数不连续，导致光电子发射速率大幅增加(约5倍)。

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Hot electron photoemission from plasmonic nanoparticles: Role of transient absorption in surface mechanism

We analyze and compare surface- and volume-based internal photoelectric effects from spherical nanoparticles, obtaining analytical expressions for the photoemission rate in both cases. Similar to results for a flat metal surface, one can show that the surface mechanism prevails, since it is unaffected by detrimental hot electron collisions. Transient absorption results from dielectric permittivity discontinuity at the nanoparticle boundary and leads to a substantial (by ~5 times) increase of the photoelectron emission rate.

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2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics

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