中国物理B ›› 2005, Vol. 14 ›› Issue (8): 1665-1670.doi: 10.1088/1009-1963/14/8/036

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Influence of external field and particle size upon theoretical photoelectron emission spectral response of silver nano-particles embedded in BaO thin film

马勇1, 杨黎东2, 杨海3, 杨智3   

  1. (1)Adult Education College, Yunnan University, Kunming 650091, China; (2)Department of computer, Baoshan Normal College, Baoshan 678000, China; (3)Department of physics, Yunnan Normal University, Kunming 650092}, China
  • 收稿日期:2004-12-28 修回日期:2005-03-14 出版日期:2005-07-13 发布日期:2005-07-13
  • 基金资助:
    Project supported by the Natural Science Foundation of Yunnan Province (Grant No 2004A00229M).

Influence of external field and particle size upon theoretical photoelectron emission spectral response of silver nano-particles embedded in BaO thin film

Yang Hai (杨海)a, Yang Li-Dong (杨黎东)b, Ma Yong (马勇)c, Yang Zhi (杨智)a   

  1. a Department of physics, Yunnan Normal University, Kunming 650092, China; b Department of computer, Baoshan Normal College, Baoshan 678000, China; c Adult Education College, Yunnan University, Kunming 650091, China
  • Received:2004-12-28 Revised:2005-03-14 Online:2005-07-13 Published:2005-07-13
  • Supported by:
    Project supported by the Natural Science Foundation of Yunnan Province (Grant No 2004A00229M).

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摘要： The dependence of the spectral distribution of photoelectron emission from silver nano-particles embedded in BaO semiconductor thin film on external voltage and the size of silver nano-particles is predicted and investigated theoretically. The photoelectron emission response curves to light of wavelength between 0.2 and 0.8μm are given. The dependence of the wavelength threshold on the size of silver nano-particles and external field strength is also shown. Photoemission in the visible spectrum is explained as due to the optical resonance absorption in the silver particles. This could be of importance in designing field-assisted photocathodes and finding their optimum operation conditions.

关键词: photoemission, photoelectron spectra, semiconductor films

Abstract: The dependence of the spectral distribution of photoelectron emission from silver nano-particles embedded in BaO semiconductor thin film on external voltage and the size of silver nano-particles is predicted and investigated theoretically. The photoelectron emission response curves to light of wavelength between 0.2 and 0.8μm are given. The dependence of the wavelength threshold on the size of silver nano-particles and external field strength is also shown. Photoemission in the visible spectrum is explained as due to the optical resonance absorption in the silver particles. This could be of importance in designing field-assisted photocathodes and finding their optimum operation conditions.

Key words: photoemission, photoelectron spectra, semiconductor films

中图分类号:  (Clean metal, semiconductor, and insulator surfaces)

  • 79.60.Bm
78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures) 78.66.Li (Other semiconductors)