非线性线缺陷光子晶体波导的宽带慢光效应

Broadband Slow Light Effect of Nonlinear Line Defect Photonic Crystal Waveguide

采用克尔型非线性材料为光子晶体的介质柱,构建线缺陷耦合腔波导。利用非线性有限时域差分法(NL-FDTD)进行模拟仿真,并获得最佳宽带慢光效果。当群速度达到10-2数量级时,带宽为0.0920,比线性光子晶体耦合腔波导慢光带宽提高五倍,而且群速度色散降低两个数量级,实现了低群速度下更宽带宽和更低色散的慢光波导。

Kerr nonlinear photonic crystal material was employed to build line defect waveguide coupled cavity. The nonlinear finite-difference time-domain method （NL-FDTD） was used in simulation, and the best broadband slow light effect was realized. When the group velocity reached 10 2 orders of magnitude, the bandwidth is 0. 0920,the band width of the slow waveguide is five times higher than that of the linear photonic crystal coupled cavity waveguide, and the group velocity dispersion is reduced by two orders of magnitude. Slow waveguide with wider bandwidth and lower dispersion at low group velocity is achieved.