Dataset for Broadband three-mode converter and multiplexer based on cascaded symmetric Y-junctions and subwavelength engineered MMI and phase shifters

This work has been funded in part by the Spanish Ministry of Science and Innovation (MICINN) under grants RTI2018-097957-B-C33, PID2020-115353RA-I00; the Spanish State Research Agency (MCIN/ AEI/10.13039/501100011033); the Community of Madrid – FEDER funds (S2018/NMT-4326); the European Union – NextGenerationEU through the Recovery, Transformation and Resilience Plan (DIN2020- 011488, PTQ2021-011974); and the European Union's Horizon Europe research and innovation program under the Marie Sklodowska-Curie grant agreement Nº 101062518.