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
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
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.
2002, Vol. 19 
