@article {1232071,
	title = {Visible Wavelength Planar Metalenses Based on Titanium Dioxide},
	journal = {IEEE Journal of Selected Topics in Quantum Electronics},
	volume = {23},
	number = {3},
	year = {2017},
	url = {http://ieeexplore.ieee.org/document/7588110/},
	author = {M Khorasaninejad and WT Chen and AY Zhu and Oh, J and RC Devlin and C Roques-Carmes and I Mishra and F. Capasso}
}
