摘要
本文用快速傅里叶变换对LT GaAs衬底共面微带传输线光生超短电脉冲的时域传输特性进行了数值计算 结果表明 ,THz以上高频范围的模式色散、LT GaAs衬底切伦科夫辐射衰减使超短电脉冲信号沿LT GaAs衬底共面微带传输线超传输时波形畸变 ,初始光生电脉冲越窄 ,则信号波形畸变越严重 减簿衬底厚度可降低LT GaAs衬底共面微带传输线的模式色散和辐射衰减 ,有利于改善LT
Based on the dispersion and attenuation data obtained from the semiempirical dispersion formula for coplanar transmission lines,the propagation of ultrashort electrical pulses along coplanar striplines on LT GaAs have been stimulated in the time domain by the fast Fourier transform numerically in this paper.It has been shown that the modal dispersion and Cerenkov electromagnetic radiation in the substrate at the terahertz regime dominate the evolution of the pulses propagating in the coplanar striplines,and the shorter pulses will experience the more serious distortion that can be greatly reduced by using a superstrate of the same substrate.
出处
《光子学报》
EI
CAS
CSCD
2000年第4期312-316,共5页
Acta Photonica Sinica
基金
国家自然科学基金!( #98740 82 )
广东省自然科学基金资助项目
