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 $4.9\mathrm{dB}/\mathrm{cm}$. Grating couplers, with an insertion loss of $\sim 6\mathrm{dB}$ per coupler and 3 dB bandwidth of $\sim 50\mathrm{nm}$, are also demonstrated and integrated with microring resonators.

© 2014 Optical Society of America

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