Linear Electro-optic Effect in Silicon Nitride Waveguides Enabled by Electric-Field Poling.

ABSTRACT: Stoichiometric silicon nitride (Si₃N₄) is one of the most mature integrated photonic platforms for linear and nonlinear optical applications on-chip. However, because it is a centrosymmetric material, second-order nonlinear processes are inherently not available in Si₃N₄, limiting its use for multiple classical and quantum applications. In this work, we implement thermally assisted electric-field poling, which allows charge carrier separation in the waveguide core, leading to a depletion zone formation and the inscription of a strong electric field reaching 20 V/μm. The latter results in an effective second-order susceptibility (χ⁽²⁾) inside the Si₃N₄ waveguide, making linear electro-optic modulation accessible on

SUBMITTER: Zabelich B 

PROVIDER: S-EPMC9585632 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature