@article {doi:10.1021/acsphotonics.1c01744,
	title = {Adjoint-optimized metasurfaces for compact mode-division multiplexing},
	journal = {ACS Photonics},
	year = {2022},
	doi = {10.1021/acsphotonics.1c01744},
	url = {https://doi.org/10.1021/acsphotonics.1c01744},
	author = {Jaewon Oh and Li, Kangmei and Yang, Jun and Wei Ting Chen and Li, Ming-Jun and Dainese, Paulo and Federico Capasso}
}
