Hybrid structure laser based on semiconductor nanowires and a silica microfiber knot cavity Available to Purchase

We demonstrate a hybrid structure laser consisting of a single or multiple zinc oxide (ZnO) nanowires attached to a silica microfiber knot cavity, which is pumped by 355 nm wavelength laser pulses. The laser threshold is lower than $0.2μJ/pulse$⁠. The measured linewidth of the lasing mode is about 0.04 nm. The hybrid structure combines advantages of high gain of semiconductor nanowires and high quality factor of microfiber knot cavities. Additionally, the design offers convenient and efficient approach to both pumping and collection of the semiconductor nanowire lasers.