| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Coupled Optical Tamm States in a Planar Dielectric Mirror Structure Containing a Thin Metal Film |
| ZHOU Hai-Chun1, YANG Guang1,2**, WANG Kai2, LONG Hua2, LU Pei-Xiang1,2** |
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074
2School of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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ZHOU Hai-Chun, YANG Guang, WANG Kai et al 2012 Chin. Phys. Lett. 29 067101 |
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Abstract The coupling between two optical Tamm states (OTSs) with the same eigenenergy is numerically investigated in a planar dielectric mirror structure containing a thin metal film. The reflectivity map in this structure at normal incidence is obtained by applying the transfer matrix method. Two splitting branches appear in the photonic bandgap region when both adjacent dielectric layers of metal film are properly set. The splitting energy of two branches strongly depends on the thickness of the metal film. According to the electric field distribution in this structure, it is found that the high-energy branch corresponds to the antisymmetric coupling between two OTSs, while the low-energy branch is associated with the symmetric coupling between two OTSs. Moreover, the optical difference frequency of two branches is located in a broad terahertz region.
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Received: 22 November 2011
Published: 31 May 2012
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| PACS: |
71.10.Li
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(Excited states and pairing interactions in model systems)
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42.70.Qs
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(Photonic bandgap materials)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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