3路耦合硅脊波导中的冻光模式

2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) Pub Date : 2019-01-01 DOI:10.23919/USNC-URSI-NRSM.2019.8713100

Raed Almhmadi, K. Sertel

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引用次数: 8

摘要

研究了三路耦合周期硅脊波导通带内的固定拐点支持的冻光模式。精确调整前向和后向传播模式之间的耦合导致模式退化，群速度消失。该单元胞被调优以获得色散图中第三个分支上的SIP。随后，我们展示了一个具有23个单元格的有限结构，以支持SIP频率下的冻结模式。在这个例子中，SIP的群速度比真空中的光速慢385倍。研究并给出了有限结构在SIP频率下的传输共振以及器件内的场分布。

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Frozen-Light Modes in 3-way Coupled Silicon Ridge Waveguides

Frozen-light modes supported by the stationary inflection point (SIP) within the pass band of 3-way coupled periodic silicon ridge waveguides is demonstrated. Precise tuning of the coupling between forward and backward propagating modes lead to mode degeneracy with vanishing group velocity. The unit cell is tuned to obtain the SIP on the third branch in the dispersion diagram. Subsequently, we demonstrate a finite structure with 23 unit cells to support the frozen mode at the SIP frequency. For this example, the group velocity at the SIP is 385 times slower than speed of light in vacuum. Transmission resonances of the finite structure, as well as the field distribution within the device at the SIP frequency are studied and presented.

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2019 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)

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