Wideband and low dispersion slow light in slotted photonic crystal waveguide

Wideband and low dispersion slow light in slotted photonic crystal waveguide
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开槽光子晶体波导中的宽带和低色散慢光

DOI:
10.1016/j.optcom.2010.03.037
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发表时间:
2010-07
影响因子:
2.4
通讯作者:
Wu, Jun
Wu, Jun
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Peng, Chao;Li, Yanping;Wang, Ziyu;Wu, Jun

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提出了一种在光子晶体波导缝隙中产生宽带低色散慢光的方法。通过改变缝隙光子晶体波导第一、第二排空气孔的位置,可以提高慢光的带宽,同时具有较小的群速度色散。利用二维平面波展开方法,数值模拟了在17.6nm、6.7nm和3.3nm带宽上,群折射率分别为23、42和54的慢光。最大归一化延迟带宽积为0.26。从制造的角度来看,改变孔的位置比改变空气孔的直径更容易在技术上控制。此外,我们的模拟表明,这种设计是容忍的偏差的前两排空气孔的位置。因此,所提出的方法减少了对制造精度的依赖。
We present a procedure to generate wideband and low dispersion slow light in slotted photonic crystal waveguide. By shifting the first and second rows of air holes of slotted photonic crystal waveguide, the bandwidth of slow light can be increased, with small group velocity dispersion. Using 2D plane wave expansion method, we numerically demonstrate slow light with the nearly constant group indices of 23, 42, and 54 over 17.6nm, 6.7nm and 3.3nm bandwidth, respectively. The maximal normalized delay-bandwidth product is 0.26. From the fabrication's point of review, shifting the position of holes is easier to be controlled technically than changing the diameters of air holes. In addition, our simulations suggest this design is tolerant to deviation for positions of the first two rows of air holes. Therefore, the proposed approach decreases the dependence on the fabrication accuracy.
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