Versatile silicon-waveguide supercontinuum for coherent mid-infrared spectroscopy
Versatile silicon-waveguide supercontinuum for coherent mid-infrared spectroscopy
Laser frequency combs, with their unique combination of precisely defined spectral lines and broad bandwidth, are a powerful tool for basic and applied spectroscopy. Here, we report offset-free, mid-infrared frequency combs and dual-comb spectroscopy through supercontinuum generation in silicon-on-sapphire waveguides. We leverage robust fabrication and geometrical dispersion engineering of nanophotonic …