Localized modes in defect-free dodecagonal quasiperiodic photonic crystals
Localized modes in defect-free dodecagonal quasiperiodic photonic crystals
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DOI：
10.1103/physrevb.68.165106
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发表时间：
2003-10
影响因子：
3.7
通讯作者：
Yiquan Wang;Xiaoyong Hu;Xingsheng Xu;B. Cheng;Dao-zhong Zhang
中科院分区：
文献类型：
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作者：
Yiquan Wang;Xiaoyong Hu;Xingsheng Xu;B. Cheng;Dao-zhong Zhang
研究了电磁波在无缺陷十二方准周期光子晶体中的传输特性和局域化问题。总能流和态密度的计算结果表明，对于TM偏振的电磁波，十二方QPC具有光子带隙。然而，与周期性光子晶体不同的是，具有特定频率的电磁波在完美的十二方量子光子晶体中被局域在某些特定的区域。微波区的相应实验证实了这一现象。量子光子晶体中局域模的出现可以归因于两种空间结构特性的竞争：自相似性和非周期性。
The transmission property and localization of electromagnetic waves in defect free dodecagonal quasiperiodic photonic crystals (QPCs) are studied. The simulation of total energy flow and the density of states show that the dodecagonal QPC has a photonic gap for TM polarized electromagnetic waves. However, different from the periodic photonic crystals, electromagnetic waves with certain frequencies are localized at some special regions inside a perfect dodecagonal QPC. A corresponding experiment in the microwave region confirms the phenomenon. It is believed that the occurrence of localized modes in QPCs can be attributed to the competition between two spatial structural properties: self-similarity and nonperiodicity.