摘要
提出了一种光子晶体波导与随机介质相结合的特殊型波导的设计方法。基于光子晶体波导模型,建立了ZnO随机介质作为线缺陷的光子晶体波导模型,采用时域有限差分(FDTD)法分析了ZnO随机介质的加入对光子晶体波导系统的频率特性、时域特性及增益特性的影响,并且与纯随机介质系统和含有线缺陷的光子晶体波导系统进行对比。分析结果表明,当在光子晶体波导的缺陷层引入ZnO随机介质时,随机介质使得光在缺陷处振荡并得到放大,局域化程度比纯随机介质系统和纯光子晶体波导系统更高;且光与随机介质的相互作用使得光在波导中时间延长,激光阈值降低。这种光子晶体波导可用于制备可嵌入到集成光路领域和低阈值的微型激光器。
A special type of waveguides consisting of photonic crystal waveguide and random media is investigated.Based on the photonic crystal waveguide model,a new kind of photonic crystal waveguides with random media is put forward.In this paper,by employing the finite-difference time-domain（FDTD） method,the influences of the embedded ZnO random particles on the frequency,time-domain,gain characteristics of photonic crystal waveguide are studied.The simulation results demonstrate that in the present of random media in the defect layer of photonic crystal,the light in the defect area is obviously amplified,and the localization level is higher than the pure random media and photonic crystal waveguide,respectively.In addition,the interaction time between the random gain medium and the light is lengthened and the threshold is reduced.The waveguide can be used in the field of integrated optical system and microlaser with low threshold.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2012年第10期112-116,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(61172044)
河北省自然科学基金(F2010002002)资助课题
关键词
光通信
光子晶体波导
随机介质
时域有限差分法
局域态
optical communications
photonic crystal waveguide
random medium
finite-difference time-domain
localization
