@article {Li:747,
	title = {On-chip zero-index metamaterials},
	journal = {Nat. Photonics},
	volume = {9},
	year = {2015},
	pages = {738{\textendash}742},
	abstract = {Metamaterials with a refractive index of zero exhibit physical properties such as infinite phase velocity and wavelength. However, there is no way to implement these materials on a photonic chip, restricting the investigation and application of zero-index phenomena to simple shapes and small scales. We designed and fabricated an on-chip integrated metamaterial with a refractive index of zero in the optical regime. Light refracts perpendicular to the facets of a prism made of this metamaterial, directly demonstrating that the index of refraction is zero. The metamaterial consists of low-aspect- ratio silicon pillar arrays embedded in a polymer matrix and clad by gold films. This structure can be fabricated using standard planar processes over a large area in arbitrary shapes and can efficiently couple to photonic integrated circuits and other optical elements. This novel on- chip metamaterial platform opens the door to exploring the physics of zero index and its applications in integrated optics.},
	doi = {10.1038/nphoton.2015.198},
	url = {/files/mazur/files/rep_747.pdf},
	author = {Y. Li and S. Kita and P. Mu{\~n}oz and O. Reshef and D. Inna Vulis and M. Yin and Loncar, M. and Mazur, E.}
}
