Low-Loss Zero-Index Materials


Haoning Tang, Clayton DeVault, Sarah Alejandra Camayd-Muñoz, Yueyang Liu, Danchen Jia, Fan Du, Olivia Mello, Daryl I. Vulis, Yang Li, and Eric Mazur. 1/2021. “Low-Loss Zero-Index Materials.” Nano Lett, 21, 2, Pp. 914-920. Publisher's Version



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 resonances via resonance-trapped and symmetry-protected states. Using these approaches, we experimentally obtain quality factors of 2.6 × 103 and 7.8 × 103 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.

Last updated on 02/01/2021