| 大孔径光导天线技术产生太赫兹波的研究 |
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| 引用本文： | 常青,杨冬晓,王亮,王英. 大孔径光导天线技术产生太赫兹波的研究[J]. 激光技术, 2006, 30(6): 574-577 |
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| 作者姓名： | 常青 杨冬晓 王亮 王英 |
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| 作者单位： | 浙江大学,信息与电子工程学系,杭州,310027;浙江大学,信息与电子工程学系,杭州,310027;国际电磁科学院,浙江大学分院,杭州,310058 |
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| 摘 要： | 传统的Drude-Lorentz方法只是适用于小孔径光导天线,对于大孔径光导天线,该算式的精确度已经远远不能达到要求。为了深入研究大孔径光导天线技术,在Drude-Lorentz理论的基础上,对光生载流子浓度的计算方法进行了改进,修正了其两个假设条件带来的误差,使之适合大孔径光导天线模拟计算。结果表明,改进的计算模型完全可以对大孔径光导天线进行模拟,并在此基础上分析计算了不同条件下大孔径光导天线的太赫兹辐射场及其频谱的变化,证明了这种新的计算模型可以满足大孔径光导天线太赫兹源的模拟计算的要求。
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| 关 键 词： | 超快光学 太赫兹波 Drude-Lorentz理论 大孔径光导天线 |
| 文章编号： | 1001-3806(2006)06-0574-04 |
| 收稿时间： | 2005-11-15 |
| 修稿时间： | 2006-04-21 |
Study on terahertz generation from large-aperture photoconductive antenna |
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| CHANG Qing,YANG Dong-xiao,WANG Liang,WANG Ying. Study on terahertz generation from large-aperture photoconductive antenna[J]. Laser Technology, 2006, 30(6): 574-577 |
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| Authors: | CHANG Qing YANG Dong-xiao WANG Liang WANG Ying |
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| Affiliation: | 1. Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China; 2. The Electromagnetics Academy at Zhejiang University, Hangzhou 310058, China |
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| Abstract: | The small dipole aperture antenna provides a normal way for THz radiation,for which the Drude-Lorentz theory provides method to calculate the terahertz waves from photoconductor.For sake of this Drude-Lorentz theory is not suitable for large-aperture photoconductive antenna,the calculation of terahertz radiation from biased photoconductive antenna(Drude-Lorentz theory) is reported,and a meliorated calculation method of carriers' density is put forward.Based on the new calculation model and simulation results,the effect of different factors on THz radiation is analyzed.The results show that the new calculation model is more suitable for a large aperture antenna. |
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| Keywords: | ultrafast optics terahertz wave Drude-Lorentz theory large-aperture photoconductive antenna |
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