@article {220,
	title = {Near-zero refractive index photonics},
	journal = {Nature Photonics},
	volume = {11},
	year = {2017},
	pages = {149},
	doi = {https://doi.org/10.1038/nphoton.2017.13},
	url = {https://doi.org/10.1038/nphoton.2017.13},
	author = {Liberal, I{\~n}igo and Engheta, Nader}
}
