On-chip optical sources from THz to optical frequencies

On-chip optical sources are an essential part of fully functional photonic integrated circuits. We show a range of on-chip optical sources from THz to optical frequencies. These include hyperbolic metasurface near-infrared light sources emitting highly linearly polarized light, topologically protected robust single-mode lasers, nanoscale LEDs capable of supporting high-speed on-chip optical communication, and photonic crystal ferromagnet/ultrawide bandgap semiconductor heterostructures spintronic THz emitters. These light sources are all compatible with existing integrated circuit platforms.