中国物理B ›› 2001, Vol. 10 ›› Issue (11): 1062-1065.doi: 10.1088/1009-1963/10/11/314

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THEORETICAL DEPENDENCE OF LONG WAVELENGTH PHOTOEMISSION UPON THE SIZE OF Ag NANOPARTICLES EMBEDDED IN BaO SEMICONDUCTOR THIN FILM

许北雪1, 吴锦雷1, 杨海2, 蔡武德2   

  1. (1)Department of Electronics, Peking University, Beijing 100871, China; (2)Department of Physics, Yunnan Normal University, Kunming 650092, China
  • 收稿日期:2001-05-17 修回日期:2001-07-15 出版日期:2001-11-15 发布日期:2005-06-12

THEORETICAL DEPENDENCE OF LONG WAVELENGTH PHOTOEMISSION UPON THE SIZE OF Ag NANOPARTICLES EMBEDDED IN BaO SEMICONDUCTOR THIN FILM

Yang Hai (杨海)a, Cai Wu-de (蔡武德)a, Xu Bei-xue (许北雪)b, Wu Jin-lei (吴锦雷)b    

  1. a Department of Physics, Yunnan Normal University, Kunming 650092, China; b Department of Electronics, Peking University, Beijing 100871, China
  • Received:2001-05-17 Revised:2001-07-15 Online:2001-11-15 Published:2005-06-12

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摘要： The dependence of long wavelength photoemission upon the size of Ag nanoparticles embedded in a BaO semiconductor is predicted and discussed theoretically. The calculated results show that the increase in the diameter of the Ag nanoparticle, in the range from 1.5 to 37.0nm, leads to the emergence of a roughly Gaussian form of the photoemission spectra and the peaks become markedly narrower. The results also show that the increase in the diameter of the Ag nanoparticle leads to the decrease of the long wavelength threshold. The incident light wavelength corresponding to the peak value of the photoemission gets bigger with the increase of the size of Ag nanoparticles, thus showing a redshift.

Abstract: The dependence of long wavelength photoemission upon the size of Ag nanoparticles embedded in a BaO semiconductor is predicted and discussed theoretically. The calculated results show that the increase in the diameter of the Ag nanoparticle, in the range from 1.5 to 37.0nm, leads to the emergence of a roughly Gaussian form of the photoemission spectra and the peaks become markedly narrower. The results also show that the increase in the diameter of the Ag nanoparticle leads to the decrease of the long wavelength threshold. The incident light wavelength corresponding to the peak value of the photoemission gets bigger with the increase of the size of Ag nanoparticles, thus showing a redshift.

Key words: photoemission, thin film, semiconductors

中图分类号:  (Interfaces; heterostructures; nanostructures)

  • 79.60.Jv
78.66.Hf (II-VI semiconductors) 78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters) 68.55.-a (Thin film structure and morphology)