Hybrid integrated photonics using bulk acoustic resonators.

ABSTRACT: Integrated photonic devices based on Si₃N₄ waveguides allow for the exploitation of nonlinear frequency conversion, exhibit low propagation loss, and have led to advances in compact atomic clocks, ultrafast ranging, and spectroscopy. Yet, the lack of Pockels effect presents a major challenge to achieve high-speed modulation of Si₃N₄. Here, microwave-frequency acousto-optic modulation is realized by exciting high-overtone bulk acoustic wave resonances (HBAR) in the photonic stack. Although HBAR is ubiquitously used in modern communication and superconducting circuits, this is the first time it has been incorporated on a photonic integrated chip. The tight vertical acoustic confinement releases the lateral design of freedom, and enables negligible

SUBMITTER: Tian H 

PROVIDER: S-EPMC7299988 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature