| 多功能磁光子晶体太赫兹可调偏振控制器件 |
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| 引用本文： | 范飞,郭展,白晋军,王湘晖,常胜江. 多功能磁光子晶体太赫兹可调偏振控制器件[J]. 物理学报, 2011, 60(8): 84219-084219. DOI: 10.7498/aps.60.084219 |
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| 作者姓名： | 范飞 郭展 白晋军 王湘晖 常胜江 |
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| 作者单位： | 南开大学现代光学研究所, 光电信息技术科学教育部重点实验室, 天津 300071 |
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| 基金项目： | 国家重点基础研究发展计划(批准号:2007CB310403)、国家自然科学基金(批准号:60772105)、天津市自然科学基金(批准号:10JCZDJC15200)和教育部博士点基金(批准号:20090031110033)资助的课题. |
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| 摘 要： | 通过对磁场控制下的二维磁光子晶体太赫兹波偏振传输特性的研究,利用铁氧体磁光材料的磁导率随外磁场改变而变化的特点,设计了具有可控起偏、偏振分束和可调谐波片功能的光子晶体太赫兹偏振控制器件.利用平面波展开法和严格耦合波分析分别计算了光子晶体带隙位置和透过率随外磁场强度变化的关系,用时域有限差分法计算了场分布和相位.结果表明,该结构可以实现高偏振消光比的偏振起偏器和分束器,以及在1 THz附近-π-π相位范围的连续可调谐波片.关键词：太赫兹光子晶体铁氧体偏振控制
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| 关 键 词： | 太赫兹 光子晶体 铁氧体 偏振控制 |
| 收稿时间： | 2010-09-25 |
Magnetically tunable magneto-photonic crystals for multifunctional terahertz polarization controller |
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| Fan Fei,Guo Zhan,Bai Jin-Jun,Wang Xiang-Hui and Chang Sheng-Jiang. Magnetically tunable magneto-photonic crystals for multifunctional terahertz polarization controller[J]. Acta Physica Sinica, 2011, 60(8): 84219-084219. DOI: 10.7498/aps.60.084219 |
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| Authors: | Fan Fei Guo Zhan Bai Jin-Jun Wang Xiang-Hui Chang Sheng-Jiang |
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| Affiliation: | Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China;Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China;Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China;Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China;Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin 300071, China |
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| Abstract: | A multifunctional terahertz polarization controller is designed based on the two-dimensional photonic crystal structure and the ferrite material. The different working devices including a controllable polarizer, a polarization beam splitter and a tunable phase retarder with continuous phase retardations of -π—π at 1 THz are controlled by the shift of photonic band gap with different external magnetic fields. By using the plane wave expansion method and the rigorous coupled wave analysis, we calculate the band gap positions and transmittances of device with the variation of magnetic field. The field distribution and phase are simulated by the finite difference time domain method. |
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| Keywords: | terahertz photonic crystal ferrite polarization control |
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