GaAs光电导天线辐射太赫兹波功率的计算  

The calculation of terahertz wave power radiated from GaAs photoconductive antenna

作　　者：贾婉丽[1] 施卫[1] 屈光辉[1] 孙小芳[1] 

机构地区：[1]西安理工大学理学院应用物理系,西安710048

出　　处：《物理学报》2008年第9期5425-5428,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10390160;10376025和50477011);国家重点基础研究发展计划(973计划)(批准号:2007CB310406)资助的课题~~

摘　　要：在Larmor公式的基础上建立了适合计算光电导天线辐射太赫兹波功率的数学模型,利用此数学模型通过蒙特卡罗方法分别计算了不同实验条件下GaAs光电导天线辐射太赫兹电磁波功率.计算结果表明,增加光电导天线的偏置电场或触发光能量,都能够提高天线辐射太赫兹波功率,大孔径光电导天线能够承载更多的光生载流子,因而可以产生比小孔径光电导天线功率更高的太赫兹波.Based on the Larmor formula, a mathematic model is established to calculate the power of THz wave radiated form the photoconductive antenna. The power of THz waves radiated by GaAs photoconductive antenna under different experimental conditions was calculated by Monte Carlo simulations. The results show that the power of THz radiation can be improved by increasing the bias electric field or the energy of triggering light pulse, and large-aperture photoconductive antenna can emit THz wave with higher power compared with photoconductive antennas with small apertures because the former can carry more photogenerated carriers.

关 键 词：光电导天线 Larmor公式 太赫兹波功率 

分 类 号：TN820[电子电信—信息与通信工程]