We propose a numerical investigation of slow light rainbow trapping and releasing in a tapered photonic crystal waveguide which is formed by linearly modifying the structural parameters in low-symmetric photonic crystals. Through dispersion analysis and numerical simulations, the electromagnetic waves of different frequencies in a normalized bandwith of ~5% can be trapped at different positions, as called “rainbow trapping”. Moreover, the tapered photonic crystal waveguide is created on polystyrene subtract, of which refractive index can be adjusted by tuning the external voltage based on electro-optic effect. Therefore, when the applied voltage is properly modulated, the trapped wave will be captured in different positions even released. The structure has broad application prospects in optical switch, wavelength-division multiplexing, and other optical communication devices.

我们建议对通过线性修改低对称光子晶体中的结构参数形成的锥形光子晶体波导中的慢光彩虹捕获和释放进行数值研究。通过色散分析和数值模拟，在约 5% 的归一化带宽内的不同频率的电磁波可以在不同的位置被捕获，称为“彩虹捕获”。此外，锥形光子晶体波导是在聚苯乙烯减法上创建的，其折射率可以通过基于电光效应调整外部电压来调整。因此，当施加的电压被适当调制时，陷波会在不同的位置被捕获甚至释放。该结构在光开关、波分复用、