Abstract
To study the optical properties of the metal-insulator granular films, a series of Nix(SiO2)1-x and Aux(SiO2)1-x granular films was made with a variation of x and the annealing process. The complex dielectric function was measured in the 1.5-4.8-eV photon energy range. New spectral features were found in the dielectric functions. For Aux(SiO2)1-x samples, a new peak in the ε2 spectra is seen around 2 eV, especially for x = 0.67. The ε1 spectra change continuously from positive to negative in the low photon energy range, resulting in a true zero of ε1 associated with the plasmon occurring at 2.0-2.5 eV and at about 3.6 eV for the Au- and Ni-based films, respectively. Compared to previous data, the experimental results obtained in this work provide richer information to understand better the optical properties of the metal-granular films that are not well predicted by the theoretical model. The effect will be useful in the metallic multilayer structure design and applications.
Original language | English (US) |
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Pages (from-to) | 113-115 |
Number of pages | 3 |
Journal | Physica B: Condensed Matter |
Volume | 279 |
Issue number | 1-3 |
DOIs | |
State | Published - Apr 2000 |
Externally published | Yes |
Event | The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) - Kowloon Tong, Hong Kong Duration: Jun 21 1999 → Jun 25 1999 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering