The polariton laser now runs on electricity, operates at room temperature, and could be key to on-chip optical interconnects.
Now, researchers at the University of Michigan have built the first polariton laser that both runs on electricity and operates at room temperature. It emits coherent light when provided with a current of only 169 amperes per square centimeter. A similar structure operating as an ordinary laser would take more than 250 times as much current, and even the best gallium nitride laser, enhanced with quantum dots, requires at least 1000 A/cm2 before it starts lasing.
Read more at spectrum.ieee.org or download the scientific article