Verstuyft Mattias, Akiki Elias, Vanwolleghem Mathias, Ducournau Guillaume, Lampin Jean-François, Walter Benjamin, Bavedila Fuanki, Lebouvier Édouard, Faucher Marc, Kuyken Bart
Opt Express. 2022 Feb 28;30(5):6656-6670. doi: 10.1364/OE.447268.
Dielectric waveguides are capable of confining and guiding terahertz waves along sub-wavelength sized structures. A small feature size allows for a denser integration of different photonic components such as modulators, beam-splitters, wavelength (de)multiplexers and more. The integration of components on a small scale requires bending of the waveguides. In this paper we demonstrate a very short silicon 90°-bend, based on total internal reflection on an elliptically curved outer facet and a rounding of the inner corner joining two waveguides, with an average loss of 0.14 dB per bend in the 600-750 GHz range.
介质波导能够沿着亚波长尺寸的结构限制和引导太赫兹波。小特征尺寸允许不同光子组件（如调制器、分束器、波长（解）复用器等）更密集地集成。在小尺度上集成组件需要波导弯曲。在本文中，我们展示了一种非常短的硅90°弯曲，它基于椭圆弯曲外表面上的全内反射以及连接两个波导的内角倒圆，在600 - 750 GHz范围内每个弯曲的平均损耗为0.14 dB。
