Studying of the Dipole Characteristic of THz from Photoconductors
Under the different experimental conditions, THz waveform which was generated by the different GaAs photoconductive switch provided with diverse carrier lifetimes triggered by femo-second laser pulse are calculated. The results indicate the main course of the dipole characteristic of THz waveforms emitting from low-temperature grown GaAs is the lifetime of optical-generated carriers less than the generation time; To SI-GaAs photoconductive semicon-ductor switches with the lifetime of optical-generated carriers more than 100 ps, the dipole char-acteristic of THz waveforms is mainly because of intra-valley scatter and the space charge field screening on different experimental conditions (different biased electric field and different optical pulse energy).
Hong Liu Weili Ji Wei Shi
School of Automation and Information Engineering,Xian University of Technology,China
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-5
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）