超快电子衍射法中的 "反常 "光电效应

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2024-05-14 DOI:10.1134/s0021364024600745

S. A. Aseyev, B. N. Mironov, D. G. Poydashev, A. A. Ischenko, E. A. Ryabov

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引用次数: 0

摘要

通过对快速激光诱导过程的电子脉冲探测，可以直接观察到物质结构的高时空分辨率动态变化。金薄膜似乎是一个方便的光电阴极，飞秒紫外线辐射诱导了光电子发射，其光子能量约为4.65-4.75 eV（特别是，钛：蓝宝石激光的三次谐波为4.65 eV）。对于线性光电效应来说，这个能量与纯金属的参考功函数 WAu $ \cong $ 5.1-5.3 eV 相矛盾。我们分析了产生这种矛盾的原因，并提出了一个产生光电子脉冲的模型，与实验数据达成了良好的一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$“Anomalous” Photoelectric Effect in the Ultrafast Electron Diffraction Method$

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“Anomalous” Photoelectric Effect in the Ultrafast Electron Diffraction Method

Electron-pulse probing of fast laser-induced processes has allowed the direct observation of the structural dynamics in matter with a high spatiotemporal resolution. A thin gold film has appeared to be a convenient photocathode, and photoelectron emission has been induced by femtosecond ultraviolet radiation with a photon energy of about 4.65–4.75 eV (in particular, $\hbar $ω $ \cong $ 4.65 eV for the third harmonic of the Ti:sapphire laser). For the linear photoelectric effect, this energy contradicts the reference work function W_Au $ \cong $ 5.1–5.3 eV of pure metal. Reasons for such contradiction have been analyzed and good agreement with experimental data has been reached with a model proposed for the generation of photoelectron pulses.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.