Microstructure and optical absorption of Au-MgF2 nanoparticle cermet films

• 来源期刊: 中国物理（英文版）
• 关键词: nanoparticle cermet films microstructure optical absorption
• 年，卷（期）: 2006,（4）
• 页码范围: 859-865
• 页数: 7页
• 语种: 英文

摘要

The microstructure and optical absorption of Au-MgF2 nanoparticle cermet films with different Au contents are studied.The microstructural analysis shows that the films are mainly composed of the amorphous MgF2 matrix with embedded fcc Au nanoparticles with a mean size of 9.8-21.4nm.Spectral analysis suggests that the surface plasma resonance (SPR) absorption peak of Au particles appears at λ=492-537nm.With increasing Au content,absorption peak intensity increases,profile narrows and location redshifts.Theoretical absorption spectra are calculated based on Maxwell-Garnett theory and compared with experimental spectra.