High-Q and low-loss chalcogenide waveguide for nonlinear supercontinuum generation

We report on wafer-scale processing of GeSbS-based chalcogenide waveguides on silicon substrates. High Q-factor (10
⁶
), low propagation loss (0.2 dB/cm), and supercontinuum generation in a 2-cm-long waveguide with 120 pJ pulses are demonstrated.