Frozen-Light Modes in 3-way Coupled Silicon Ridge Waveguides
Frozen-Light Modes in 3-way Coupled Silicon Ridge Waveguides
复制标题
三路耦合硅脊波导中的冻结光模式
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
K. Sertel
中科院分区：
文献类型：
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作者：
Raed Almhmadi;K. Sertel
研究了三路耦合周期硅脊波导通带内固定拐点（SIP）支持的冻结光模。精确调谐前向和后向传播模式之间的耦合导致模式简并与消失的群速度。调谐晶胞以获得色散图中第三分支上的SIP。随后，我们展示了一个有限的结构与23个单元格，以支持冻结模式在SIP频率。对于这个例子，SIP处的群速度比真空中的光速慢385倍。有限结构的传输谐振，以及在SIP频率的设备内的场分布进行了研究和介绍。
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.