slotted 有线性逐渐变细的槽的单个模式的 photonic 水晶波导被介绍认识到慢光,曲线其分散被改变槽宽度转移。当槽宽度被减少时,在逐渐变细的结构的乐队曲线移动,和光的组速度在截止频率接近零。因此,指导的光的不同频率部件被减慢沿着在逐渐变细的槽 photonic 水晶波导内的繁殖方向甚至局部性。而且,这结构能在狭窄的槽波导限制慢光波,它可以有效地提高在慢光之间的相互作用,低索引的 wave-guiding 材料填槽。另外,这逐渐变细的槽结构能被用来由修改结构补偿慢光的组速度分散,因此为极端宽的带宽打开机会慢光。
A slotted single-mode photonic crystal waveguide with a linear tapered slot is presented to realize slow light, whose dispersion curve is shifted by changing the slot width. When the slot width is reduced, the band curve shifts in the tapered structure, and the group velocity of light approach zero at the cut-off frequency. Therefore, different frequency components of the guided light are slowed down even localized along the propagation direction inside a tapered slot photonic crystal waveguide. Furthermore, this structure can confine slow light-wave in a narrow slot waveguide, which may effectively enhance the interaction between slow light and the low-index wave-guiding materials filled in the slot. In addition, this tapered slot structure can be used to compensate group velocity dispersion of slow light by modifying the structure, thus opening the opportunity for ultra-wide bandwidth slow light.