Erratum to: Multi-moded high-index contrast optical waveguide for super-contrast high-resolution label-free microscopy - Jayakumar Nikhil; Dullo Firehun T.; Dubey Vishesh; Ahmad Azeem; Ströhl Florian; Cauzzo Jennifer; Guerreiro Eduarda Mazagao; Snir Omri; Skalko-Basnet Natasa; Agarwal Krishna; Ahluwalia Balpreet Singh (Nanophotonics)