带有光子晶体波导的微型随机激光器研究

Study of micro-laser with photonic crystal waveguide

文中采用有限时域差分(FDTD)法研究了Zn O随机介质与光子晶体波导相结合的微型激光器的辐射特性和频谱特性,用平面波展开法分析了光子晶体能带特性。数值研究结果表明:由于光与随机介质相互作用,使得光在该微型激光器中放大,损耗减小,存在较长滞留时间,同时随机介质局域光的能力变强,激光的阈值降低,而且含四方格子结构光子晶体的激光器具有良好的激光特性和调制作用。该新型器件的设计与研究将为研制可嵌入集成光子芯片的、低阈值的微型激光器提供理论基础。

The transmission and frequency characteristics of the micro-laser with photonic crystal waveguide were analyzed in this paper based on the finite-difference-domain（FDTD） method. The results demonstrate that, compared with the pure random media or pure photonic crystal waveguide, the light in defect area with random media is obviously amplified, meanwhile the localization level becomes higher either. On the other hand, the interaction time between the random gain medium is prolonged, the loss and the threshold is reduced. In addition, the light can be modulated by the triangle lattice photonic crystal. The design of new device in this paper lay a theoretical foundation of integrated optical system and micro-laser with low threshold.