Low-Loss Strip-Loaded SiN Waveguides on Engineered AlN for Quantum Photonic Applications

Integrated photonics based on silicon has attracted great interest for its potential to provide compact and efficient solutions for functional devices. However, silicon suffers of several limitations, including a low indirect bandgap of 1.1 eV and negligible second-order nonlinear optical properties, which hinder the realization of low loss electro-optic modulators and second-order nonlinear processes.