Highly efficient silicon mode converter andpolarization rotator using a silicon-based hybridplasmonic waveguide

IF 1.8 4区 物理与天体物理 Q3 OPTICS Journal of The Optical Society of America B-optical Physics Pub Date : 2023-10-09 DOI:10.1364/josab.502238
Basma Abu-elmaaty, Hossam Shalaby
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Abstract

We propose and numerically analyze a broadband, ultracompact hybrid plasmonic mode converter/polarization rotator. The proposed device converts the fundamental transverse magnetic mode (TM 0 ) to the first-order transverse electric mode (TE 1 ). The mode converter is designed using a tapered hybrid plasmonic waveguide in which metal parts are directly surrounding both the input Si waveguide and the tapered output waveguide without a thin low-index layer. After optimizing the proposed structure, a TM 0 -to-TE 1 mode converter with a modal conversion efficiency of 98.2% is achieved. A broad operating bandwidth of 100 nm is achieved with a compact footprint of only 0.8µm×12.5µm for the whole device. At a wavelength of 1550 nm, the insertion loss ranges from 0.91 dB to 1.19 dB using different metal materials, and the extinction ratio of the TE 1 and TM 0 modes is higher than 21 dB in the output Si waveguide.
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采用硅基混合等离子波导的高效硅模式转换器和偏振旋转器
我们提出并数值分析了一种宽带、超紧凑的混合等离子体模式转换器/偏振旋转器。所提出的器件将基频横向磁模(TM 0)转换为一阶横向电模(TE 1)。该模式转换器采用锥形混合等离子体波导设计,其中金属部件直接包围输入硅波导和锥形输出波导,而没有薄的低折射率层。经过结构优化,实现了模态转换效率为98.2%的TM 0 - te 1模式转换器。实现了100nm的宽工作带宽,整个器件的紧凑占地面积仅为0.8µm×12.5µm。在1550 nm波长下,不同金属材料的插入损耗范围为0.91 ~ 1.19 dB,输出Si波导中TE 1和TM 0模式的消光比均高于21 dB。
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来源期刊
CiteScore
4.00
自引率
5.30%
发文量
374
审稿时长
2.1 months
期刊介绍: The Journal of the Optical Society of America B (JOSA B) is a general optics research journal that complements JOSA A. It emphasizes scientific research on the fundamentals of the interaction of light with matter such as quantum optics, nonlinear optics, and laser physics. Topics include: Advanced Instrumentation and Measurements Fiber Optics and Fiber Lasers Lasers and Other Light Sources from THz to XUV Light-Induced Phenomena Nonlinear and High Field Optics Optical Materials Optics Modes and Structured Light Optomechanics Metamaterials Nanomaterials Photonics and Semiconductor Optics Physical Optics Plasmonics Quantum Optics and Entanglement Quantum Key Distribution Spectroscopy and Atomic or Molecular Optics Superresolution and Advanced Imaging Surface Optics Ultrafast Optical Phenomena Wave Guiding and Optical Confinement JOSA B considers original research articles, feature issue contributions, invited reviews and tutorials, and comments on published articles.
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