| 太赫兹光电导天线发射装置的优化设计 |
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| 引用本文： | 徐朝辉,樊宇.太赫兹光电导天线发射装置的优化设计[J].激光技术,2012,36(4):504-507. |
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| 作者姓名： | 徐朝辉 樊宇 |
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| 作者单位： | 周口师范学院物理与电子工程系,周口,466001 |
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| 基金项目： | 河南省基础与前沿技术研究计划资助项目，河南省教育厅科学技术研究重点资助项目 |
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| 摘 要： | 为了研究金属纳米狭缝对太赫兹光电导天线辐射功率的影响,基于时域有限差分法对太赫兹波通过金属狭缝时的增强特性进行了分析计算,研究了太赫兹波通过金属纳米狭缝电场的增强幅度与狭缝宽度和太赫兹波频率之间的规律。结果表明,在太赫兹光电导天线发射装置上增加一个纳米狭缝能够增强太赫兹波的发射功率,频率为0.1THz的太赫兹波通过70nm宽度金属狭缝时,辐射功率最大可以增强800倍。该研究结果对太赫兹光电导天线结构的改进有一定的借鉴意义。
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| 关 键 词： | 激光技术 太赫兹波 光电导天线 纳米金属狭缝 辐射功率 |
| 收稿时间： | 2011/10/2 |
Optimum design of radiation facility of THz photoconductive antennas |
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| XU Zhao-hui
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FAN Yu.Optimum design of radiation facility of THz photoconductive antennas[J].Laser Technology,2012,36(4):504-507. |
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| Authors: | XU Zhao-hui FAN Yu |
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| Institution: | (Department of Physics and Electronic Engineering,Zhoukou Normal University,Zhoukou 466001,China) |
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| Abstract: | In order to study effect of metal nano-gaps on the radiation power of THz photoconductive antennas, enhancement characteristics of THz wave passing through nano-gaps were calculated by means of finite difference time domain method. The dependence of the intensity of the electromagnetic field on the frequency of THz wave and the width of mental slit was discussed. The results showed that the power of THz wave can be enhanced by the THz photoconductive antennas attached with metal nano-gap, and the power of 0.1THz wave can be enhanced by 800 times with it passing through a metal nano-gap in 70nm width. The work has a certain reference to the design of antenna structure. |
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| Keywords: | laser technique THz wave photoconductive antenna metal nano-gap radiation power |
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