Diatoms as living photonic crystals
Diatoms as living photonic crystals
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DOI：
10.1007/s00340-004-1419-4
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发表时间：
2004-02-01
影响因子：
2.1
通讯作者：
Sumper, M
中科院分区：
文献类型：
--
作者：
Fuhrmann, T;Landwehr, S;Sumper, M
我们提出了一个代表性的硅藻，圆筛藻granii的光学结构的分析。二氧化硅单元壁可以看作是具有中等折射率对比度的光子晶体平板波导。在一个细胞中，至少有两种不同的模式被发现：一个六边形阵列的孔与一个大的晶格常数的阀门，和一个正方形阵列的孔与一个小的晶格常数的腰带。结果表明，光可以耦合到波导中，并有一些光子共振在可见光谱范围内，这已被确定的能带结构计算。
We present an analysis of the optical structure of a representative diatom, Coscinodiscus granii. The silica cell wall can be regarded as a photonic crystal slab waveguide with moderate refractive-index contrast. In a cell, at least two different patterns are found: a hexagonal array of pores with a large lattice constant in the valve, and a square array of holes with a small lattice constant in the girdle. It is demonstrated that light can be coupled into the waveguide and that there are some photonic resonances in the visible spectral range, which have been determined by band-structure calculations.