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arXiv 2408.02673physics.opticsphysics.app-ph
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利用氧化石墨烯二维薄膜在硅波导与环形谐振器中实现集成纳米光子偏振器

Integrated nanophotonic polarizers in silicon waveguides and ring resonators using graphene oxide 2D films

David J. Moss

AI总结:

本文将二维氧化石墨烯薄膜集成到硅波导和微环谐振器上,利用其各向异性光吸收实现集成偏振器,实验获得约17 dB偏振相关损耗和约10 dB偏振消光比,并验证了超过100 nm的宽带工作能力。

摘要:

我们通过将二维氧化石墨烯(GO)薄膜集成到硅(Si)光子器件上,实验展示了波导和微环谐振器(MRR)偏振器。具有高度各向异性光吸收的二维GO薄膜被片上集成,并对其厚度和尺寸进行了精确控制。针对具有不同GO薄膜厚度、涂覆长度和硅波导宽度的制备器件,我们进行了详细测量。结果表明,混合波导实现了约17 dB的最大偏振相关损耗(PDL),混合MRR实现了约10 dB的最大偏振消光比(PER)。我们还表征了这些偏振器的波长相关和功率相关响应。前者展示了超过约100 nm的宽工作带宽,后者验证了GO薄膜中光热变化所带来的性能提升。通过将实验结果与理论模拟进行拟合,我们发现GO薄膜损耗的各向异性主导了这些器件的偏振选择性。这些结果凸显了二维GO薄膜在硅光子平台上实现高性能偏振选择器件的巨大潜力。

英文摘要:

We experimentally demonstrate waveguide and microring resonator (MRR) polarizers by integrating 2D graphene oxide (GO) films onto silicon (Si) photonic devices. The 2D GO films with highly anisotropic light absorption are on-chip integrated with precise control over their thicknesses and sizes. Detailed measurements are performed for the fabricated devices with different GO film thicknesses, coating lengths, and Si waveguide widths. The results show that a maximum polarization-dependent loss (PDL) of ~17 dB is achieved for the hybrid waveguides, and the hybrid MRRs achieved a maximum polarization extinction ratio (PER) of ~10 dB. We also characterize the wavelength- and power-dependent response for these polarizers. The former demonstrates a broad operation bandwidth of over ~100 nm, and the latter verifies performance improvement enabled by photo-thermal changes in GO films. By fitting the experimental results with theoretical simulations, we find that the anisotropy in the loss of GO films dominates the polarization selectivity of these devices. These results highlight the strong potential of 2D GO films for realizing high-performance polarization selective devices in Si photonic platform.

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