In this letter, we investigate a tapered coupler for efficient coupling of light between a planar HIMI plasmonic and dielectric waveguides. The coupler gives an overall transmission efficiency of 98% at optical wavelength of 1550 nm. It offers long propagation length 328 $$\mu \hbox {m}$$ at the mode propagation loss of 0.0132 dB/ $$\mu \hbox {m}$$ . The coupler’s efficiency has also been investigated with respect to its important parameters. The entire structure occupies a footprint area of 3 $$\times$$ 1.2 $$\mu \hbox {m}^2$$ and it is CMOS compatible with on-chip applications.

中文翻译：

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电介质和 HIMI 等离子体波导之间的光有效耦合

在这封信中，我们研究了一种锥形耦合器，用于在平面 HIMI 等离子体和介电波导之间有效耦合光。耦合器在 1550 nm 的光波长下提供 98% 的整体传输效率。它在模式传播损耗为 0.0132 dB/ $$\mu \hbox {m}$$ 时提供长传播长度 328 $$\mu \hbox {m}$$ 。耦合器的效率也已就其重要参数进行了研究。整个结构占用的封装面积为 3 $$\times$$ 1.2 $$\mu \hbox {m}^2$$ 并且它与片上应用的 CMOS 兼容。