| Original Articles |
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Ellipsometric Spectra and Optical Properties of Anisotropic SrBi2Ta2O9 Films |
| MO Dang1;LIU Yi1,2;G. D. Hu3;J. B. Xu3 |
| 1State Key Laboratory of Optoelectronic Materials and Technologies and Department of Physics, Zhongshan University, Guangzhou 510275
2Normal College, Shenzhen University, Shenzhen 518060
3Department of Electronic Engineering and Material Science and Technology Research Center, The Chinese University of Hong Kong, Hong Kong |
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| Cite this article: |
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MO Dang, LIU Yi, G. D. Hu et al 2004 Chin. Phys. Lett. 21 266-268 |
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Abstract Ellipsometric spectra of the SrBi2Ta2O9 (SBT) films of (200) and (0010) predominant orientation are measured and analysed in the range of photon energy from 2 to 5 eV. The results show that the oriented SBT films appear to be strongly anisotropic. The ellipsometric spectra of the (200)-predominant SBT films are different from those of the (0010)-predominant films. We suggest an analysis model for these oriented films and perform the fitting of the anisotropic ellipsometric spectra. The refractive index and the extinction coefficient of the ordinary ray and the extraordinary ray for these oriented SBT films are obtained. The ordinary refractive index is larger than the extraordinary one.
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| Keywords:
07.60.Fs
78.20.-e
78.20.Fm
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Published: 01 February 2004
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| PACS: |
07.60.Fs
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(Polarimeters and ellipsometers)
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78.20.-e
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(Optical properties of bulk materials and thin films)
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78.20.Fm
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(Birefringence)
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