Optical Tamm state theory study on asymmetric DBR-metal-DBR structure
Optical Tamm state theory study on asymmetric DBR-metal-DBR structure
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非对称DBR-金属-DBR结构的光学Tamm态理论研究
DOI：
10.7498/aps.62.167303
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发表时间：
2013-08-01
影响因子：
1
通讯作者：
Zhu Ye-Yu
中科院分区：
文献类型：
--
作者：
Jiang Yao;Zhang Wei-Li;Zhu Ye-Yu
作为一种特殊的金属表面态, 光学Tamm态 (OTS) 对光的控制和操作具有独到优势, 在新一代光子器件设计中备受青睐.在分布式布拉格反射器（DBR）-金属-DBR（DMD）结构的基础上，通过两个DBR中心频率的不匹配，引入非对称机制来设计和控制OTS的产生。通过对反射光谱和电场分布特征的分析，揭示了OTS在金属各面的相互作用和变化规律。结果表明，DMD结构可以支持两个不同本征波长的OTS的存在。此外，失配δ将影响两个OTS的强度和本征波长，即，OTS的上、下分支随δ的变化而出现。此外，入射光的偏振态和入射角对OTS的强度和本征波长也有相当大的影响。
As a special metal surface state, optical Tamm state (OTS) has been widely used in designing the new generation of optical devices for its unique advantages in light control and operation. Based on distribute Bragg reflector (DBR)-metal-DBR (DMD)structure, asymmetric mechanism is introduced by mismatching central frequencies of the two DBRs to design and control the generation of OTS. Through the analysis of reflection spectrum and the electric field distribution characteristics, the interaction and variation rules of OTS on each side of metal are revealed. The results indicate that the DMD structure can support the presence of two OTSs with different intrinsic wavelengths. Besides, the mismatch delta will affect the strengths and intrinsic wavelengths of the two OTSs, i.e., the upper and lower branches of OTS appear with the variation of delta. In addition, polarization state and injection angle of incident light have a considerable influence on the strength and intrinsic wavelength of OTS.