Polarization-independent multimode interference coupler with anisotropy-engineered bricked metamaterial  

作　　者：Carlos Perez-Armenta Alejandro Ortega-Monux Jose Manuel Luque-Gonzalez Robert Halir Pedro J.Reyes-Iglesias Jens Schmid Pavel Cheben Inigo Molina-Fernandez J.Gonzalo Wanguemert-Perez 

机构地区：[1]Telecommunication Research Institute(TELMA),Universidad de Malaga,CEI Andalucia TECH,E.T.S.I.Telecomunicacion,29010 Malaga,Spain [2]Bionand Center for Nanomedicine and Biotechnology,Parque Tecnologico de Andalucia,Malaga 29590,Spain [3]National Research Council Canada,Ottawa,Ontario K1A 0R6,Canada

出　　处：《Photonics Research》2022年第4期I0001-I0009,共9页光子学研究（英文版）

基　　金：Ministerio de Economía y Competitividad(PID2019-106747RB-I00);Junta de Andalucía (P18-RT-1453, UMA-FEDERJA-158);Ministerio de Ciencia,Innovación y Universidades (FPU16/06762, FPU19/02408);Universidad de Málaga.

摘　　要：Many applications, including optical multiplexing, switching, and detection, call for low-cost and broadband photonic devices with polarization-independent operation. While the silicon-on-insulator platform is well positioned to fulfill most of these requirements, its strong birefringence hinders the development of polarizationagnostic devices. Here we leverage the recently proposed bricked metamaterial topology to design, for the first time, to our knowledge, a polarization-independent 2 × 2 multimode interference coupler using standard 220 nm silicon thickness. Our device can be fabricated with a single etch step and is optimized for the O-band,covering a wavelength range of 160 nm with excess loss, polarization-dependent loss, and imbalance below 1 dB and phase errors of less than 5°, as demonstrated with full three-dimensional finite-difference time-domain simulations.

关 键 词：POLARIZATION MULTIMODE MULTIPLEXING 

分 类 号：TN622[电子电信—电路与系统] TB34[一般工业技术—材料科学与工程]