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In this work, we investigated a new type of infrared photodetector based on InAs sub-monolayer quantum dots grown by molecular beam epitaxy (MBE). Their properties were compared with those of photodetectors containing conventional InAs quantum dots obtained by the same deposition technique, but in the Stranski-Krastanov growth mode. Dark current, noise, responsivity and absorption measurements have shown that, depending on the structure of the samples, the devices with sub-monolayer quantum dots can perform very well.

Fotodetectores de radiação infravermelha baseados em pontos quânticos de submonocamada