| Influence of Ambient Atmosphere on the Plasmon Resonance Absorption of Ag／SiOx（0≤x≤2） Nanocomposite Film |
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| 引用本文： | 杨林,李广海,等.Influence of Ambient Atmosphere on the Plasmon Resonance Absorption of Ag／SiOx（0≤x≤2） Nanocomposite Film[J].中国物理快报,2002,19(6):867-870. |
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| 作者姓名： | 杨林 李广海 |
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| 作者单位： | [1]ResearchandDevelopmentCenterforOptoelectronics,InstituteofSemiconductors,ChineseAcademyofSciences,Beijing100083 [2]InstituteofSolidStatePhysics,ChineseAcademyofSciences,Hefei230031 |
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| 摘 要： | Nanocomposite films consisting of nanosized Ag particles embedded in partially oxidized amorphous Si-containing matrices were prepared by radio frequency magnetron co-sputtering deposition.We studied the influence of ambient atmosphere during the preparation and heat-treatment of Ag/SiOx(0≤x≤2) nanocomposite film on its optical absorption properties.We found that the plasmon resonance absorption peak shifts to shorter wavelengths with the increasing oxygen content in the SiOx matrix.The analysis indicates that the potential barrier between Ag nanoparticles and SiOx matrix increases with the increasing x value,which will induce the surface resonance state to shift to higher energy.The electrons in the vicinity of the Fermi level of Ag nanoparticles must absorb more energy to be transferred to the surface resonance state with the increasing x value.It was also found that the plasmon resonance absorption peaks of the samples annealed in different ambient atmospheres are located at about the same position.This is because the oxidation surface layer is dense enough to prevent the oxygen from peretration into the sample to oxidize the silicon in the inner layer.
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| 关 键 词： | 薄膜 环境大气压强 等离子共振吸收 |
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