Fe-doped polycrystalline CeO2 as terahertz optical material

被引：12
作者：
State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China [1 ]
不详 [2 ]
机构：
[1] State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China
[2] Institute of Laser and Optoelectronics, College of Precision Instrument and Optoelectronics Engineering, Tianjin University
来源：
Chin. Phys. Lett. | 2009年 / 4卷
关键词：
D O I：
10.1088/0256-307X/26/4/047803
中图分类号：
学科分类号：
摘要：
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 of 4, while a small amount of Fe (0.9 at. %) doping into CeO2 promotes densification and induces a large e 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 1.8 THz is less than 0.35 cm-1, implying that Fe-doped CeO 2 is a potential THz optical material. © 2009 Chinese Physical Society and IOP Publishing Ltd.
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