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Influence of nanocrystal size on dielectric functions of Si nanocrystals embedded in matrix

Applied Physics Letters, ISSN: 0003-6951, Vol: 95, Issue: 16
2009
  • 47
    Citations
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  • 29
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Metrics Details

  • Citations
    47
    • Citation Indexes
      47
  • Captures
    29

Article Description

The complex dielectric functions of Si-nanocrystals (nc-Si) with different sizes embedded in SiO matrix synthesized by SiO / SiO superlattice approach is obtained by spectroscopic ellipsometry. The Maxwell-Garnett effective medium approximation and the Lorentz oscillator model are employed in the spectra fitting. The dependence of the dielectric functions on the nc-Si size is observed. A significant suppression in amplitude of the dielectric functions with respect to bulk crystalline silicon, and a large influence of the nc-Si size on the E and E critical points are observed and discussed. © 2009 American Institute of Physics.

Bibliographic Details

Rong Jun Zhang; Yi Ming Chen; Wei Jie Lu; Qing Yuan Cai; Yu Xiang Zheng; Liang Yao Chen

AIP Publishing

Physics and Astronomy

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