论文标题
片上极化编码的单量门大门，带有扭曲的波导
On-chip polarization-encoded single-qubit gates with twisted waveguides
论文作者
论文摘要
Integrated Photonics是可扩展的经典和基于量子光的信息处理的非凡平台。然而，尽管芯片的极化操纵在信息处理中具有基本意义，但仍然难以捉摸。最近在飞秒激光刻有扭曲的波导中已证明了极化操作能力，尽管尚未针对这种体系结构建立对极化操纵的系统理论描述。在这项工作中，我们开发了一种严格的理论，即扭曲的波导以封闭形式揭示其本征量和传输矩阵。利用发达的理论，我们证明了扭曲的波导可以实现几乎任意的极化变换，同时满足合理的设计约束。这一事实结合了较低的成本和易于插入光子集成电路的原型制作，使我们可以将扭曲的波导作为芯片上极化编码的信息处理的强大构建块。
Integrated photonics is a remarkable platform for scalable classical and quantum light-based information processing. However, polarization manipulation on a chip despite of its fundamental significance in information processing remains elusive. Polarization manipulation capabilities have been recently demonstrated in femtosecond laser-inscribed twisted waveguides, although the systematic theoretical description of polarization manipulation has not been established for this architecture. In this work we develop a rigorous theory of a twisted waveguide unveiling its eigenmodes and transmission matrix in the closed form. Utilizing the developed theory, we demonstrate that twisted waveguides can realize virtually arbitrary polarization transformations while satisfying reasonable design constraints. This fact combined with low cost and ease of prototyping of laser inscribed photonic integrated circuits allows us to suggest twisted waveguide as a robust building block for on-chip polarization-encoded information processing.
