Design and fabrication of rod-type two-dimensional photonic crystal slabs with large high-order bandgaps in near-infrared wavelengths.
Design and fabrication of rod-type two-dimensional photonic crystal slabs with large high-order bandgaps in near-infrared wavelengths.
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DOI：
10.1364/ol.37.001424
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发表时间：
2012-05
期刊：
影响因子：
3.6
通讯作者：
Liyong Jiang;W. Jia;G. Zheng;Xiang-yin Li
中科院分区：
文献类型：
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作者：
Liyong Jiang;W. Jia;G. Zheng;Xiang-yin Li
我们提出了一种新型的二维光子晶体平板，它由许多不同半径和不同位置的硅棒组成，在正方形晶格单元图案中。利用遗传算法对这种棒状光子晶片进行了自动优化，并将其制作在绝缘体上硅晶片上。特别是，测量的五棒样品的透射谱表明，在1498-1648 nm之间有一个大的可接受的高阶禁带(禁带尺寸为9.54%)。基于多重Bragg和Mie散射理论，我们对本研究中发现的大的高阶带隙给出了合理的解释。
We proposed a novel two-dimensional photonic crystal slab comprised of a number of silicon rods with different radii and locations in the square-lattice unit cell pattern. Such rod-type photonic crystal slabs were automatically optimized by the genetic algorithm and fabricated on the silicon-on-insulator wafer. In particular, the measured transmission spectra of the five-rods sample have shown a large accepted high-order bandgap between 1498 and 1648 nm (gap size is 9.54%). Based on the theories of multiple Bragg and Mie scattering effects, we have given a reasonable explanation to the large high-order bandgaps found in the present study.