@article {1105396,
	title = {Topology Optimized Multi-layered Meta-optics},
	journal = {Physical Review Applied},
	volume = {9},
	year = {2018},
	pages = {044030},
	url = {https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.9.044030},
	author = {Lin, Zin and Benedikt Groever and Federico Capasso and Alejandro W. Rodriguez and Lon{\v c}ar, Marko}
}
