基于 Sb2Se3/Si 波导的数据通信波长非易失可重构偏振旋转器
Nonvolatile reconfigurable polarization rotator at datacom wavelengths based on a Sb2Se3/Si waveguide
AI总结：
本文提出一种基于 Sb2Se3/Si 波导的非易失可重构偏振旋转器，通过改变 Sb2Se3 的非晶/晶态实现混合电磁模式干涉调控，在 1310 nm 波长下实现零静态功耗、紧凑尺寸的高效偏振转换，为硅光子学偏振管理提供节能方案。
摘要：
硅光子学因其高折射率及与互补金属氧化物半导体制造的兼容性，已成为光子集成电路（PICs）的关键平台。然而，硅波导固有的双折射特性要求进行高效的偏振管理。在此，我们报告了一种使用工作于数据通信波长（1310 nm）的 Sb2Se3/Si 波导的可重构偏振旋转器（PR），可提供零静态功耗的非易失切换。偏振转换依赖于混合电磁（EH）模式的干涉，这可以通过在非晶态和晶态之间改变 Sb2Se3 的状态来进行重构。我们的实验器件在仅 21$μ$m 长度的紧凑占用空间内，分别展现出高达 -0.08 dB 的偏振转换效率（PCE）和 17.65 dB 的偏振消光比（PER）。因此，所提出的可重构 PR 为硅光子学中的偏振管理提供了一种紧凑且节能的解决方案，在数据通信网络以及受益于偏振信息编码的新兴应用（如光神经网络和量子计算）中具有潜在应用前景。
英文摘要：
Silicon photonics has become a key platform for photonic integrated circuits (PICs) due to its high refractive index and compatibility with complementary metal-oxide-semiconductor manufacturing. However, the inherent birefringence in silicon waveguides requires efficient polarization management. Here, we report a reconfigurable polarization rotator (PR) using a Sb2Se3/Si waveguide operating at datacom wavelengths (1310 nm), providing nonvolatile switching with zero static power consumption. The polarization conversion relies on the interference of hybrid electric-magnetic (EH) modes, which can be reconfigured by changing the Sb2Se3 state between amorphous and crystalline. Our experimental device exhibits a polarization conversion efficiency (PCE) and a polarization extinction ratio (PER) as high as -0.08 dB and 17.65 dB, respectively, in a compact footprint of just 21$μ$m length. Therefore, the proposed reconfigurable PR offers a compact and energy-efficient solution for polarization management in silicon photonics, with potential applications in data communication networks and emerging applications benefiting from polarization information encodings, such as optical neural networks and quantum computing.
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