Multichannel optical diode with unidirectional diffraction relevant total transmission
Multichannel optical diode with unidirectional diffraction relevant total transmission
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DOI：
10.1364/oe.20.014980
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发表时间：
2012-07-02
期刊：
影响因子：
3.8
通讯作者：
Ozbay, Ekmel
中科院分区：
文献类型：
--
作者：
Serebryannikov, Andriy E.;Cakmak, A. Ozgur;Ozbay, Ekmel
我们将证明，对于由各向同性线性材料制成的非对称光子晶体光栅中的线偏振入射波，可以在固定的非零或零入射角下获得带内总传输最大值的宽带单向光传输。基于衍射和色散效应的融合，研究的基本物理机制利用了与高阶相关的传输通道，当空间反演对称性被破坏时，两个光栅界面处的耦合条件出现不对称性。由于法布里-珀罗型共振与衍射异常的混合产生了类似二极管的工作状态，因此可以获得一个方向的总透射率和相反方向的零透射率。如果波纹面被照亮，则可以获得单光束偏转和双光束分裂，其传输可以（几乎）完全。与之前的研究相比，还表明，当全透射发生在非波纹侧照明时，单向透射只能在固定频率下出现并且仅由于衍射而出现，这与洛伦兹引理一致。 (c) 2012 年美国光学学会
We will show that broadband unidirectional optical transmission with a total transmission maximum inside the band can be obtained for linearly polarized incident waves in the nonsymmetric photonic crystal gratings made of isotropic linear materials at a fixed nonzero or zero angle of incidence. Being based on the merging of diffraction and dispersion effects, the basic physical mechanism studied exploits the transmission channels associated with higher orders, for which asymmetry in the coupling conditions at the two grating interfaces appears when spatial inversion symmetry is broken. Total transmission in one direction and zero transmission in the opposite direction can be obtained due to hybridization of Fabry-Perot type resonances with a diffraction anomaly that yields a diode-like operation regime. Single-beam deflection and two-beam splitting can be obtained, for which transmission can be (nearly) total, if the corrugated side is illuminated. In contrast to the previous studies, it is also shown that unidirectional transmission can appear only at a fixed frequency and only due to diffractions, when total transmission occurs at the noncorrugated-side illumination, being in agreement with the Lorentz Lemma. (c) 2012 Optical Society of America