Formalism for the giant Goos-Hänchen shift in metasurface sensors with phase singularityRemoveLotfi Berguiga, Sébastien Cueff, Lydie Ferrier, Fabien Mandorlo, Taha Benyattou, Xavier Letartre, and Cécile JamoisPhys. Rev. B 113, 195413 (2026)