Tunable Fano Resonances in Mid-Infrared Waveguide-Coupled Otto Configuration
Tunable Fano Resonances in Mid-Infrared Waveguide-Coupled Otto Configuration
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DOI：
10.1007/s11468-017-0501-9
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发表时间：
2018-02
期刊：
影响因子：
3
通讯作者：
G. Zheng;Haojing Zhang;Lingbing Bu;Haiyang Gao;Linhua Xu;Yuzhu Liu
中科院分区：
文献类型：
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作者：
G. Zheng;Haojing Zhang;Lingbing Bu;Haiyang Gao;Linhua Xu;Yuzhu Liu
在Otto几何中研究了平面碳化硅/介质多层膜结构，在横向磁极化下，表面声子极化激元和平面波导模可以耦合实现Fano共振.利用耦合谐振子模型对共振耦合进行了解析分析，并通过严格的耦合波分析计算进行了数值计算，结果表明不同共振之间的耦合强度和共振波长匹配条件对Fano共振（FR）的带宽和位置起着重要作用;磁场分布也定性地解释了FR的起源。
A planar silicon carbide/dielectric multilayer structure is investigated in Otto geometry, where surface phonon polaritons and planar waveguide mode can be coupled to realize Fano resonances under transverse magnetic polarization. The resonance coupling is analytically demonstrated using the coupled harmonic oscillator model and numerically presented through rigorous coupled-wave analysis calculations, which shows that the coupling strength between different resonances and the resonant wavelength matching condition plays an important role in the bandwidth and position of the Fano resonance (FR); the magnetic field distribution was also shown to explain the origin of FRs qualitatively.