Non-near-field focus and imaging of an unpolarized electromagnetic wave through high-symmetry quasicrystals.
Non-near-field focus and imaging of an unpolarized electromagnetic wave through high-symmetry quasicrystals.
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DOI：
10.1364/oe.15.001292
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发表时间：
2007-02
期刊：
影响因子：
3.8
通讯作者：
Xiangdong Zhang;Zhiyuan Li;B. Cheng;Dao-zhong Zhang
中科院分区：
文献类型：
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作者：
Xiangdong Zhang;Zhiyuan Li;B. Cheng;Dao-zhong Zhang
采用精确多次散射数值模拟方法研究了电磁波通过二维高对称光子准晶的聚焦行为。我们发现，高对称性PQC平板透镜对两种偏振波的非近场聚焦具有普遍的特性。也就是说，使用这些平面透镜可以实现两种偏振波的非近场聚焦，它们由具有相同结构和参数的12倍、10倍和8倍2D PQC组成。这种上级特征源于PQC中较高的旋转对称性和负折射。因此，可以预期这种现象在光学器件中的潜在应用。
The focus behaviors of electromagnetic wave through two-dimensional (2D) high-symmetry photonic quasicrystals (PQCs) have been investigated by using exact multi-scattering numerical simulation. We have found that the high-symmetry PQC flat lenses possess universal feature for non-near-field focus of two kinds of polarized waves. That is to say, the non-near-field focus for two kinds of polarized waves can be realized by using these flat lenses, which are consisting of 12-fold, 10-fold and 8-fold 2D PQCs with the same structures and parameters. Such a superior feature originates from higher rotational symmetry and negative refraction in the PQCs. Thus, potential applications of such a phenomenon to optical devices can be anticipated.