title: Low-loss and high index-contrast tantalum pentoxide microring resonators and grating couplers on silicon substrates.
abstract: A platform for high index-contrast integrated photonics based on tantalum pentoxide submicrometer waveguides on silicon substrates is introduced. The platform allows demonstration of microring resonators with loaded quality factor, Q, of 67,000 and waveguides with a propagation loss of 4.9 dB/cm. Grating couplers, with an insertion loss of ~6 dB per coupler and 3 dB bandwidth of ~50 nm, are also demonstrated and integrated with microring resonators.
authors.forename: Payam
authors.initials: P
authors.lastname: Rabiei
authors.forename: Ashutosh
authors.initials: A
authors.lastname: Rao
authors.forename: Jeff
authors.initials: J
authors.lastname: Chiles
authors.forename: Jichi
authors.initials: J
authors.lastname: Ma
authors.forename: Sasan
authors.initials: S
authors.lastname: Fathpour