摘要
利用传输矩阵法和傅里叶变换,讨论了光脉冲通过光子晶体时能流密度的时-空分布,这有助于了解每一时刻光脉冲在光子晶体中各处的能量输运细节。这种能量输运行为主要是光脉冲的各傅里叶分量经历了不同的相移和幅度变化后重新相干叠加的结果。同时,也讨论了在出射端电场强度随时间的变化关系。
The temporal-spatial evolution behaviors of the dimensionless energy flux density is calculated by means of transfer matrix method and Fourier transform when the optical pulse passes through one-dimensional photonic crystals. It will help us to know the details of energy transportation at any position and any time. The energy transportation behavior is a result of the coherent superposition of all Fourier components which experience different phase shifts and different amplifications in the medium. The electric field of a Gaussian pulse at the output port is also discussed as a function of time.
出处
《激光与光电子学进展》
CSCD
北大核心
2011年第12期121-125,共5页
Laser & Optoelectronics Progress
关键词
光子晶体
能流密度
传输矩阵法
光脉冲
photonic crystals
energy flux density
transfer matrix method
optical pulse
