槽型光子晶体波导慢光特性研究

Research on Slow Light Properties of Slotted Photonic Crystal

提出了一种新颖的结构——槽型光子晶体波导结构。槽型波导将光波禁锢在低折射率槽型区域内,不仅增加了光与物质相互作用的时间,同时也增强了光与物质相互作用的强度,从而增强了低折射率区域的慢光效应。利用平面波展开法进行仿真模拟,结果表明:通过调节槽型缺陷的宽度,槽型波导中波导模式相互作用强度增强,槽缺陷中的电场强度约为高折射率区域的12倍,具有很强的光控能力,获得群速度最小值1.55×10-3c。这一结果将为基于光子晶体的光学器件的设计和应用提供有效的理论支持。

The slotted photonic crystal was proposed as a new structure.The slotted waveguide has a good ability to control light,and by means of confining light wave in the low-refractive slotted filed,it could not only increase the interaction time between light and the matter,but also enhance the interaction strength,leading to the enhancement of the slow-light effect in the low-refractive area.Slow light properties were investigated by using the Plane Wave Expansion Method（PWM）,and the simulation results show that：By adjusting the width of slotted defect,the best slow light effect could be acquired when electric field strength in the slot is 12 times higher than that of high-refractive area.The lowest group velocity is 1.55×10-3 c.The results will provide effective theoretical support to the design and application of optical phenomenon based on photonic crystal.