Analysis of the Refractive Indices of TiO2, TiOF2, and TiF4: Concept of Optical Channel as a Guide To Understand and Design Optical Materials

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• 作者：Xavier Rocquefelte ; Fabrice Goubin ; Yvan Montardi ; Nicolas Viadere ; Alain Demourgues ; Alain Tressaud ; Myung-Hwan Whangbo ; and Sté ; phane Jobic
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：May 16, 2005
• 年：2005
• 卷：44
• 期：10
• 页码：3589 - 3593
• 全文大小：109K
• 年卷期：v.44,no.10(May 16, 2005)
• ISSN：1520-510X

文摘

In an effort to gain insight into how optical properties of insulating materials are affected by a change in chemicalcomposition, we investigated the dielectric functions of titanium dioxide, TiO₂, and its fluorine-substituted phases,TiOF₂ and TiF₄, by electron energy loss spectroscopy measurements and density functional theory electronic bandstructure calculations. The refractive indices of these compounds are found to be inversely proportional to their cellvolumes per formula unit. This observation was explained by employing the concept of optical channels. Our studyindicates that the light-scattering properties of insulating compounds can be controlled by modifying their cell volumes.