Optic Tamm states: The Bloch-wave-expansion method
Optic Tamm states: The Bloch-wave-expansion method
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Optic Tamm 指出:布洛赫波展开法
DOI:
10.1103/physreva.79.043832
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发表时间:
2009-04
影响因子:
2.9
通讯作者:
Wang, Zhiguo
中科院分区:
文献类型:
--
作者:
Tan, Wei;Kang, Xiubao;Chen, Hong;Wang, Zhiguo
Optic Tamm states (OTSs) in one-dimensional photonic crystal (PhC) heterostructures are studied via a Bloch-wave-expansion method (BWEM). We show that by considering both the periodicity and the finiteness, the propagation of electromagnetic wave in a finite one-dimensional PhC can be characterized by three parameters—two Bloch impedances and the Bloch-wave vector—in the framework of the BWEM. Applying the BWEM, we give a criterion of optic Tamm states at the interfaces inside finite heterostructures. It is demonstrated that the criterion is applicable for the OTSs at the interface inside both finite PhC-PhC heterostructures and PhC-metal heterostructures. In addition, we also discuss the importance of the number and the element order of the unit cells in the occurrence of optic Tamm states.
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