The paper "High-purity microwave generation using a dual-frequency hybrid integrated semiconductor-dielectric waveguide laser" written by Jesse Mak, Albert van Rees, Rob E. M. Lammerink, Dimitri Geskus, Youwen Fan, Peter J. M. van der Slot, Chris G. H. Roeloffzen, Klaus-J. Boller is out!

The paper presents an integrated semiconductor-dielectric hybrid dual-frequency laser operating in the 1.5 μm wavelength range for microwave and terahertz (THz) generation. 

You can read it at https://arxiv.org/abs/2012.07533