Professor Yasuhiko Arakawa and Project Assistant Professor Jun Tatebayashi have succeeded in room temperature operation of the world’s smallest quantum dot laser. A single nanowire quantum dot laser consisting of 50 layers of quantum dots in a 290 nm diameter nanowire has been developed and room temperature operation has been confirmed for the first time. The characteristic temperature is 135k, the highest of any nanowire, confirming the improved performance of quantum dots. The nanowire quantum dot laser is expected to be used as a light source for future optoelectronic integrated circuits. The paper has been published online in Nature Photonics on 29 June (UK time).
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