论文部分内容阅读
提出了一种基于光子晶体楔形槽波导来实现光速减慢的方案,该方案通过改变光子晶体槽波导中空气槽的宽度来改变导波模的色散特性.当空气槽的宽度减小时,导波模色散曲线向低频方向移动.当某个频率的光沿着光子晶体楔形槽波导传播时,群速度逐渐减慢,在满足截止频率条件时群速度降为0.另外,空气槽内可以填充其他低折射率的电光或高非线性材料,被束缚在槽内的慢光与槽内填充物质的相互作用加强,可以用来实现小体积高灵敏度的各种全(电)光器件,而且这种光子晶体楔形槽波导通过结构参数优化能够实现慢光的色散补偿,为实现无高阶色散的超宽带慢光提供了可能.
A scheme of slowing down the speed of light based on a wedge groove waveguide of a photonic crystal is proposed, in which the dispersion characteristic of the guided mode is changed by changing the width of the air groove in the photonic crystal groove waveguide. When the width of the air groove is reduced, Mode dispersion curve to the low frequency direction.When a certain frequency of light along the photonic crystal wedge groove waveguide propagation, the group velocity gradually slow down, meet the cut-off frequency conditions, the group velocity reduced to 0. In addition, the air tank can be filled with other Low refractive index electro-optic or highly nonlinear materials, the interaction of slow light confined in the grooves and the filling material in the grooves, can be used to realize a variety of all-optical devices with small volume and high sensitivity, and this Photonic crystal wedge groove waveguide through the optimization of the structure parameters to achieve slow light dispersion compensation, to achieve ultra-wideband slow light without high-level dispersion possible.