使用弯曲非对称耦合波导的超紧凑集成偏振器
Ultracompact integrated polarizers using bent asymmetric coupled waveguides
摘要：
提出了一种基于弯曲耦合光波导的新型集成偏振器。器件几何形状的简单性允许其仅使用基本的标准制造步骤来实现。采用全矢量三维模式求解器和光束传输技术研究了深腐蚀波导氮化硅TE通的实现。底层物理机制的特性为宽带设备的设计带来了灵活性，该宽带设备对制造公差具有鲁棒性。本文还讨论了在光子集成电路中采用几乎设计透明的偏振器的可能性。
英文摘要：
A new type of integrated polarizer based on bent coupled optical waveguides is proposed. The simplicity of the device geometry permits its realization using only basic standard fabrication steps. A deep etched waveguide silicon nitride TE-pass implementation has been studied using a full vector 3D mode solver and beam propagation techniques. The characteristics of the underlying physical mechanism bring in flexibility to the design of broadband devices robust against fabrication tolerances. The possibility of incorporating almost design-transparent polarizers in photonic integrated circuits is also discussed.
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