Li, YangKita, ShotaCamayd-Munoz, PhilReshef, OradVulis, DarylYin, MeiLoncar, MarkoMazur, Eric2016-02-262015Li, Yang, Shota Kita, Philip Muñoz, Orad Reshef, Daryl I. Vulis, Mei Yin, Marko Loncar, and Eric Mazur. 2015. “On-Chip Zero-Index Metamaterials.” Nature Photon 9 (11) (October 19): 738–742. doi:10.1038/nphoton.2015.198. http://dx.doi.org/10.1038/nphoton.2015.198.1749-4885http://nrs.harvard.edu/urn-3:HUL.InstRepos:25623047Metamaterials 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.en-USnanophotonics and plasmonicsmetamaterialsJournal Article2016-04-2010.1038/nphoton.2015.198