Stirling Callum J, Halir Robert, Sánchez-Postigo Alejandro, Qu Zhibo, Reynolds Jamie D, Penadés Jordi Soler, Senthil Murugan Ganapathy, Ortega-Moñux Alejandro, Wangüemert-Pérez J Gonzalo, Molina-Fernández Íñigo, Mashanovich Goran Z, Nedeljkovic Milos
Opt Lett. 2021 Nov 1;46(21):5300-5303. doi: 10.1364/OL.439985.
Beam splitters are core components of photonic integrated circuits and are often implemented with multimode interference couplers. While these devices offer high performance, their operational bandwidth is still restrictive for sensing applications in the mid-infrared wavelength range. Here we experimentally demonstrate a subwavelength-structured 2×2 multimode interference coupler with high performance in the 3.1-3.7µ range, doubling the bandwidth of a conventional device.
分束器是光子集成电路的核心组件，通常由多模干涉耦合器实现。虽然这些器件具有高性能，但其工作带宽对于中红外波长范围内的传感应用仍然具有局限性。在此，我们通过实验展示了一种亚波长结构的2×2多模干涉耦合器，在3.1 - 3.7µ范围内具有高性能，其带宽是传统器件的两倍。
