Optical properties of pulsed laser deposited rutile titanium dioxide films on quartz substrates determined by Raman scattering and transmittance spectra
Optical properties of pulsed laser deposited rutile titanium dioxide films on quartz substrates determined by Raman scattering and transmittance spectra
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DOI：
10.1063/1.3021074
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发表时间：
2008-11
影响因子：
4
通讯作者：
Zhigao Hu;Wenwu Li;J. D. Wu;Jian Sun-;Qiwei Shu;X. Zhong;Ziqiang Zhu;J. Chu
中科院分区：
文献类型：
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作者：
Zhigao Hu;Wenwu Li;J. D. Wu;Jian Sun-;Qiwei Shu;X. Zhong;Ziqiang Zhu;J. Chu
利用拉曼散射和光谱透射率研究了脉冲激光沉积法生长的金红石型TiO 2薄膜在不同激光能量下的光学响应。用阿达奇的模型[S.阿达奇，物理评论B 35，7454（1987）]。金红石型TiO 2薄膜在透明区的折射率色散主要归因于较高的A1-A2电子跃迁。由于晶体结构和薄膜密度略有不同，光学带隙随堆积密度的增加而线性增加。不同的理论评价方法证实了这一现象。
Optical response of rutile TiO2 films grown under different laser energy by pulsed laser deposition has been investigated by Raman scattering and spectral transmittance. Dielectric functions in the photon energy range of 1.24–6.5 eV have been extracted by fitting the experimental data with the Adachi’s model [S. Adachi, Phys. Rev. B 35, 7454 (1987)]. The refractive index dispersion in the transparent region is mainly ascribed to the higher A1-A2 electronic transitions for the rutile TiO2 films. Owing to slightly different crystalline structures and film densities, the optical band gap linearly increases with increasing packing density. The phenomena were confirmed by different theoretical evaluation methods.