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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Ultra-slow light with high NDBP achieved in a modified W-1 photonic crystal waveguide with coupled cavities
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Ultra-slow light with high NDBP achieved in a modified W-1 photonic crystal waveguide with coupled cavities

机译：具有高NDBP的超慢光，在改进的W-1光子晶体波导中实现，具有耦合腔

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摘要

Here, a modified W-1 photonic crystal waveguide consisting of silicon rods arranged in a hexagonal lattice in the air is investigated for the aim of obtaining highly flattened defect band under the light line. This condition results in achieving ultra-low group velocity and suppresses the out of plane scatterings, simultaneously. The presented waveguide which is composed of the periodic coupled cavities inside the channel, provided high time delay with group index of n(g) similar to 647 and improved normalized delay bandwidth product of similar to 0.54 for the propagating wave. A group velocity of about similar to 0.001545c is achieved by immersing the rods with the optimized radius and periodicity of r = 0.2a and 3a into the center of the channel, respectively. The PWE and the FDTD results with slight discrepancy, present the feasibility of ultra-slow light phenomenon in the presented structure.
机译：这里，研究由布置在空气中的六边形格子中的硅棒组成的改进的W-1光子晶体波导，以获得在光线下获得高度扁平的缺陷带。 该条件导致实现超低群速度并同时抑制外平面散射。 由通道内的周期耦合空腔组成的所提出的波导，其具有类似于647的N（g）的组索引，并且改善了相似的归一化延迟带宽乘积，其用于传播波的0.54。 通过将杆浸入具有优化的半径和r = 0.2a和3a的周期性，分别实现了约0.001545℃的群体速度。 PWE和FDTD的结果略有差异，呈现出呈现结构中的超慢光现象的可行性。

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