Jaramillo-Villegas, Jose A.Imany, PooladOdele, Ogaga D.Leaird, Daniel E.Ou, Zhe-YuQi, MinghaoWeiner, Andrew M.2019-01-082019-01-082017-06Jaramillo-Villegas, J. A., Imany, P., Odele, O. D., Leaird, D. E., Ou, Z.-Y., Qi, M., & Weiner, A. M. (2017). Persistent energy–time entanglement covering multiple resonances of an on-chip biphoton frequency comb. Optica, 4(6), 655–658. https://doi.org/10.1364/OPTICA.4.000655https://hdl.handle.net/1805/18098We investigate the time-frequency signatures of an on-chip biphoton frequency comb (BFC) generated from a silicon nitride microring resonator. Using a Franson interferometer, we examine the multifrequency nature of the photon pair source in a time entanglement measurement scheme; having multiple frequency modes from the BFC results in a modulation of the interference pattern. This measurement together with a Schmidt mode decomposition shows that the generated continuous variable energy–time entangled state spans multiple pair-wise modes. Additionally, we demonstrate nonlocal dispersion cancellation, a foundational concept in time–energy entanglement, suggesting the potential of the chip-scale BFC for large-alphabet quantum key distribution.enPublisher PolicyFiber Bragg gratingsfrequency combsphotonsArticle