Bi-phase emulsion droplets as dynamic fluid optical systemsSara Nagelberg, Amy Goodling, Kaushikaram Subramanian, George Barbastathis, Moritz Kreysing, Tim Swager, Lauren Zarzar and Mathias KolleEPJ Web Conf., 215 (2019) 13003DOI: https://doi.org/10.1051/epjconf/201921513003