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首页> 外文期刊>AIP Advances >Hybrid rib-slot-rib plasmonic waveguide with deep-subwavelength mode confinement and long propagation length
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Hybrid rib-slot-rib plasmonic waveguide with deep-subwavelength mode confinement and long propagation length

机译:具有深亚波长模式限制和长传播长度的混合肋-缝-肋等离子波导

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We propose a hybrid plasmonic waveguide where a combined rib-slot-rib structure is added on the metal substrate within a low-index gap region. The optical properties of the quasi-TM fundamental mode are numerically calculated using the finite element method. Compared to the traditional hybrid plasmonic waveguide, our designed waveguiding structure can support modes with tighter confinement and longer propagation length, by properly adjusting the geometry of the rib-slot-rib structure and the gap height. In details, it can provide the hybrid mode with mode area λ2/12000 and reasonable propagation distance 23.78 μm, simultaneously. Its excellent optical performance can facilitate potential applications in ultra-compact nanophotonic devices and circuits.
机译:我们提出了一种混合等离子体激元波导,其中在低折射率间隙区域内在金属基板上添加了组合的肋-缝-肋结构。准TM基本模式的光学特性是使用有限元方法进行数值计算的。与传统的混合等离激元波导相比,我们设计的波导结构可以通过适当地调节肋缝结构的几何形状和间隙高度来支持更严格的限制和更长的传播长度的模式。详细地讲,它可以同时提供模式面积为λ 2 / 12000和合理传播距离为23.78μm的混合模式。其出色的光学性能可以促进超紧凑纳米光子器件和电路的潜在应用。

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