Observation of electromagnetically induced transparency-like transmission in terahertz asymmetric waveguide-cavities systems.
Observation of electromagnetically induced transparency-like transmission in terahertz asymmetric waveguide-cavities systems.
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DOI：
10.1364/ol.38.001379
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发表时间：
2013-05
期刊：
影响因子：
3.6
通讯作者：
Lin Chen;C. Gao;Jiaming Xu;Xiaofei Zang;B. Cai;Yiming Zhu
中科院分区：
文献类型：
--
作者：
Lin Chen;C. Gao;Jiaming Xu;Xiaofei Zang;B. Cai;Yiming Zhu
在具有两个相同腔体的太赫兹非对称平行板波导中，演示了类电磁感应透明(EIT)传输。通过改变底腔在传播方向上的对称位置，谐振时传播波的相位和两个腔之间的耦合强度都会改变，从而激发额外的非对称共振，并操纵两个不同谐振频率的失谐。两个共振之间的透明峰来自对称和不对称共振的抵消。我们还用准暗模式激发的物理图像来解释这种类似于超材料系统的类EIT传输。
Electromagnetically induced transparency (EIT)-like transmission was demonstrated in terahertz asymmetric parallel plate waveguides with two identical cavities. By shifting the position of the bottom cavity from the symmetric position in the propagation direction, both the phases of the propagating wave at resonances and the coupling strengths between two cavities are changed, resulting in exciting the additional asymmetric resonance and manipulating the detuning of two different resonant frequencies. The transparent peak between two resonances comes from the cancelation of symmetric and asymmetric resonances. We also use the physical picture of excitation of quasi-dark mode to explain this EIT-like transmission, which is similar to the metamaterial systems.