@article {PhysRevX.7.041053,
	title = {Super- and Anti-Principal-Modes in Multimode Waveguides},
	journal = {Phys. Rev. X},
	volume = {7},
	year = {2017},
	month = {Nov},
	pages = {041053},
	publisher = {American Physical Society},
	doi = {10.1103/PhysRevX.7.041053},
	author = {Ambichl, Philipp and Xiong, Wen and Bromberg, Yaron and Redding, Brandon and Cao, Hui and Rotter, Stefan}
}
