| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Fe-Doped Polycrystalline CeO2 as Terahertz Optical Material |
WEN Qi-Ye1, ZHANG Huai-Wu1, YANG Qing-Hui1, LI Sheng1, XU De-Gang2, YAO
Jian-Quan2 |
| 1State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 6100542Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072 |
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| Cite this article: |
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WEN Qi-Ye, ZHANG Huai-Wu, YANG Qing-Hui et al 2009 Chin. Phys. Lett. 26 047803 |
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Abstract Fe-doped CeO2 is synthesized by ceramic method and the effects of Fe doping on the structure and properties are characterized by ordinary methods and terahertz-time domain spectrometer (THz-TDS) technique. Our results show that pure CeO2 only has a small dielectric constant ε of 4, while a small amount of Fe (0.9at.%) doping into CeO2 promotes densification and induces a large ε of 23. From the THz spectroscopy, it is found that for undoped CeO2 both the power absorption and the index of refraction increase with frequency, while for Fe-doped CeO2 we measure a remarkable transparency together with a flat index curve. The absorption coefficient of Fe-doped CeO2 at frequency ranging from 0.2 to 1.8THz is less than 0.35cm-1, implying that Fe-doped CeO2 is a potential THz optical material.
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| Keywords:
78.20.Ci
42.25.Bs
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Received: 18 December 2008
Published: 25 March 2009
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| PACS: |
78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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42.25.Bs
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(Wave propagation, transmission and absorption)
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