On-chip single-mode CdS nanowire laser

In recent years, increasing attention has been paid to the integration of active nanowires with on-chip planar waveguides for on-chip light sources. Towards this goal, scientists in China demonstrated a highly compact on-chip single-mode cadmium sulfide (CdS) nanowire laser, by integrating a free-standing CdS nanowire onto a silicon nitride (SiN) photonic chip. The on-chip integration scheme will offer new opportunities for both nanowire photonic devices and on-chip light sources.