光子晶体反射镜中穿透长度与阻尼长度的差异
Difference between penetration and damping lengths in photonic crystal mirrors
摘要：
采用全矢量法计算了二维光子晶体平板中不同的反射镜结构。我们比较它们的光学性质，特别是，我们表明，对于异质结反射镜，与分布反射引起的延迟相关的穿透长度是不相关的特征阻尼长度的电磁能量分布在镜子中。这种意想不到的结果证明，在分布式布拉格反射器中经典地遇到的短阻尼长度和大穿透长度之间的通常折衷可以通过仔细设计的光子晶体结构来克服。
英文摘要：
Different mirror geometries in two-dimensional photonic crystal slabs are studied with fully-vectorial calculations. We compare their optical properties and, in particular, we show that, for heterostructure mirrors, the penetration length associated with the delay induced by distributed reflection is not correlated to the characteristic damping length of the electromagnetic energy distribution in the mirror. This unexpected result evidences that the usual trade-off between short damping lengths and large penetration lengths that is classically encountered in distributed Bragg reflectors can be overcome with carefully designed photonic crystal structures.
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