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首页> 外文期刊>Nanotechnology >Two-dimensional Penrose-tiled photonic quasicrystals: from diffraction pattern to band structure
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Two-dimensional Penrose-tiled photonic quasicrystals: from diffraction pattern to band structure

机译：二维彭罗斯贴片光子准晶体：从衍射图到带结构

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We report measurements of the diffraction pattern of a two-dimensional photonic quasicrystal structure and use the set of plane waves defined by the diffraction pattern as the basis of a theoretical approach to calculate the photonic band structure of the system. An important feature of the model is that it retains the essence o the rotational and inflational properties of the quasicrystal at all levels of approximation: properties lost in approximate models which artificially introduce elements of periodicity. The calculated density of modes of the quasicrystals is found to display a weakly depleted region analogous to the bandgap that occurs in a periodic system. The calculated transmission spectra for different polarizations and directions of propagation show features that correlate with the behaviour of the density of modes.
机译：我们报告了二维光子准晶体结构的衍射图样的测量结果，并使用由衍射图样定义的一组平面波作为理论方法的基础来计算系统的光子能带结构。该模型的一个重要特征是，它在所有近似水平上都保留了准晶体的旋转和膨胀特性的本质：在近似模型中人工引入了周期性元素的特性会丢失。发现所计算的准晶体的模式密度显示出类似于周期系统中出现的带隙的弱耗尽区。计算出的不同偏振和传播方向的透射光谱显示出与模式密度行为相关的特征。

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