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Microstructure and Optical Absorption Properties of Cu-MgF2 Nanoparticle Cermet Film |
| SUN Zhao-Qi1,2,3;SUN Da-Ming3;RUAN Tu-Nan1,2 |
| 1CCAST (World Laboratory), PO Box 8730, Beijing 100080
2Department of Modern Physics, University of Science and Technology of China, Hefei 230027
3Department of Physics, Anhui University, Hefei 230039 |
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| Cite this article: |
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SUN Zhao-Qi, SUN Da-Ming, RUAN Tu-Nan 2002 Chin. Phys. Lett. 19 1365-1368 |
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Abstract The microstructure and optical absorption spectra of 10-30vol% Cu-MgF2 nanoparticle cermet films prepared by co-evaporation in vacuum are examined. The results show that the Cu-MgF2 cermet films are mainly composed of amorphous MgF2 matrix with embedded fcc-Cu nanoparticles of average size 12-24 nm. The results also show that the optical absorption of the films decreases as the wavelength increases in the range of 200-800 nm. The surface plasmon resonance absorption peaks of Cu nanoparticles in 10, 20, and 30vol% Cu-MgF2 films appear at 578, 588, and 606nm, respectively, and the interband transition absorption of Cu starts from 590 nm downwards. Based on the Maxwell-Garnett theory, the experimental optical absorption properties of the films have been quantitatively evaluated.
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81.05.-t
68.55.-a
68.90.g
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Published: 01 September 2002
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81.05.-t
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(Specific materials: fabrication, treatment, testing, and analysis)
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68.55.-a
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(Thin film structure and morphology)
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68.90.g
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