Subwavelength Grating Metamaterial Structures for Integrated Photonics. - Robert Halir; Alejandro Sánchez-Postigo; Jose Manuel Luque-González; Abdelfettah Hadij-ElHouati; Daniel Pereira-Martín; Jonas Leuermann; Pablo Ginel-Moreno; Carlos Pérez-Armenta; Antonia Torres-Cubillo; Alaine Herrero-Bermello; Antonio Dias-Ponte; David González-Andrade; et al. (OFC, 2021)