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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Diodelike asymmetric transmission in hybrid plasmonic waveguides via breaking polarization symmetry
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Diodelike asymmetric transmission in hybrid plasmonic waveguides via breaking polarization symmetry

机译：通过断开极化对称的混合等离子体波导中的二极管不对称传输

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The ability to control the asymmetric propagation of light in nanophotonic waveguides is of fundamental importance to optical communications and on-chip signal processing. However, in most studies so far, the design of such structures has been based on asymmetric mode conversion where multi-mode waveguides are involved. Here we propose a hybrid plasmonic structure that performs optical diode behavior via breaking polarization symmetry in single mode waveguides. The exploited physical mechanism is based on the combination of polarization rotation and selection. The whole device is ultra-compact with a footprint of 2.95 x 14.18 mu m(2), and whose dimension is much smaller than the device previously proposed for a similar function. The extinction ratio is greater than 11.8 dB for both forward and backward propagation at lambda = 1550 nm (19.43 dB for forward propagation and 11.8 dB for the backward one). The operation bandwidth of the device is as great as 70 nm (form 1510 to 1580 nm) for extinction > 10 dB. These results may find important applications in the integrated devices where polarization handling or unidirectional propagation is required.
机译：控制纳米光波导中光的不对称传播的能力对光学通信和片上信号处理具有基本的重要性。然而，到目前为止，在大多数研究中，这种结构的设计已经基于涉及多模式波导的非对称模式转换。在这里，我们提出了一种混合等离子体结构，其通过在单模波导中通过断开偏振对称进行光学二极管行为。利用的物理机制基于极化旋转和选择的组合。整个装置是超紧凑的，占地面积为2.95×14.18 mu m（2），其尺寸远小于先前提出类似功能的装置。对于在Lambda = 1550nm的前向和向后传播（19.43dB，向后转发11.8dB），消光比大于11.8dB。该装置的操作带宽对于灭火> 10dB的灭火阀的70nm（形式1510至1580nm）。这些结果可以在需要偏振处理或单向传播的集成设备中找到重要的应用。

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