Experimental investigation of terahertz temporal response of a photoconductive switch
Picosecond or subpicosecond electrical pulses can be generated from femtosecond laser excited photoconductive switches,and this technique is an effective method to characterize the rise time of the broadband oscilloscopes recently.In this paper,low temperature grown GaAs (LT-GaAs) is used as the substrate of the photoconductive switch which is excited by the femtosecond laser.After propagating along a coplanar waveguide,the generated terahertz pulses are transferred to a 1.85 mm coaxial cable through a microwave probe.The pulse width is measured in a 70 GHz sampling oscilloscope,the FWHM value is about 7.4 ps.
terahertz pulse photoconductive switch coplanar waveguide LT-GaAs
Pengwei Gong Zhe Ma Hongmei Ma Chuntao Yang
Beijing Institute of Radio Metrology and Measurement,Beijing,China Beijing Institute of Electronic System Engineering,Beijing,China
国际会议
沈阳
英文
491-495
2012-07-27(万方平台首次上网日期,不代表论文的发表时间)