Nanowerk December 30, 2020 A photonic wire laser (PWL) is a type of laser built on a semiconductor chip that has nanometer-sized bore and a millimeter length cavity. Coupling multiple adjacent PWLs can synchronize the light beams to emit at the same or multiple wavelengths and combine their power. A team of researchers in the US (MIT, Sandia National Laboratory) proposed and demonstrated a scheme to form a coupled cavity by taking advantage of this unique feature of photonic wire lasers. They used quantum cascade lasers with antenna-coupled third-order distributed feedback grating as the platform. Inspired by the chemistry of […]
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Terahertz laser for sensing and imaging outperforms its predecessors
MIT News December 10, 2018 For experiments, a team of researchers in the US (MIT, Sandia National Laboratory) fabricated an array of 10 pi-coupled wire lasers which has high constant power, tight beam pattern, and broad electric frequency tuning. The laser operated with continuous frequency tuning in a span of about 10 gigahertz, and a power output of roughly 50 to 90 milliwatts, depending on how many pi-coupled laser pairs are on the array. The beam has a low beam divergence of 10 degrees, which is a measure of how much the beam strays from its focus over distances. The […]