@article {1573445,
	title = {Low-Loss Zero-Index Materials},
	journal = {Nano Lett},
	volume = {21},
	number = {2},
	year = {2021},
	pages = {914-920},
	abstract = {
	Abstract



	
	
		Materials with a zero refractive index support electromagnetic modes that exhibit stationary phase profiles. While such materials have been realized across the visible and near-infrared spectral range, radiative and dissipative optical losses have hindered their development. We reduce losses in zero-index, on-chip photonic crystals by introducing high-Q\&nbsp;resonances via resonance-trapped and symmetry-protected states. Using these approaches, we experimentally obtain quality factors of 2.6 {\texttimes} 103\&nbsp;and 7.8 {\texttimes} 103\&nbsp;at near-infrared wavelengths, corresponding to an order-of-magnitude reduction in propagation loss over previous designs. Our work presents a viable approach to fabricate zero-index on-chip nanophotonic devices with low-loss.
	

},
	url = {https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.0c03575},
	author = {Haoning Tang and Clayton DeVault and Sarah Alejandra Camayd-Mu{\~n}oz and Yueyang Liu and Danchen Jia and Fan Du and Olivia Mello and Daryl I. Vulis and Li, Yang and Mazur, Eric}
}
