Mid-infrared light sources serve as a key to accessing the “invisible world.” A broad range of applications, including gas detection, molecular spectroscopy, medical diagnostics, and free-space ...

Light emitters operating in the visible and near-infrared are mature, low-cost, and highly efficient, enabling their widespread use in today’s displays, communications, and smartphones. By contrast, ...

Mid-infrared semiconductor lasers operating in the 2.0–5.0 µm window have attracted significant interest for applications including trace-gas detection, molecular spectroscopy, free-space optical ...

A rendering of the metasurface chip in action. When hit with an infrared laser, the microscopic chip converts the incoming light to a higher frequency and sends it out as a narrow beam that can be ...