A novel (to our knowledge) hybrid plasmonic (HP) hollow waveguide is proposed for nanoscale optical confinement. The light is guided, with improved propagation characteristics, in an air slice sandwiched between metal and silicon. The optical mode in silicon is dragged toward the metal-dielectric (air) interface to make it a HP mode by optimizing the waveguide dimensions. In comparison to the hybrid mode confined in the dielectrics, the air-confined hybrid mode exhibits a smaller effective mode area A_m = 0.0685/μm~2 and longer propagation distance L_p = 142 μm with a low modal propagation loss of 0.03 dB/μm at optimized values of the width and height of the air slice.
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机译：提出了一种新颖的（据我们所知）混合等离子（HP）空心波导，用于纳米级光学限制。以提高的传播特性，将光引导到夹在金属和硅之间的空气层中。通过优化波导尺寸，将硅中的光学模式拖向金属-电介质（空气）界面，使其成为HP模式。与限制在电介质中的混合模式相比，空气限制混合模式的有效模态面积A_m = 0.0685 /μm〜2较小，传播距离L_p = 142μm更长，模态传播损耗为0.03 dB /μm。空气切片的宽度和高度的最佳值。
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