Low-Loss Photonic Circuits Fabricated on Antimony Trisulphide on Thin-Film Lithium Niobate Towards Nonlinear-Optic Applications

We demonstrate low-loss waveguide ($0.9 \mathrm{~dB} / \mathrm{cm}$) with strong nonlinearity of $n_{2}=5.11$ $\times 10^{-14} \mathrm{~cm}^{2} / \mathrm{W}$ fabricated on antimony trisulphide on thin-film lithium niobate. The group velocity dispersion is theoretically investigated.