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We report the observation of optically pumped continuous wave lasing in a self-rolled-up InGaAs/GaAs quantum dot microtube at room temperature. Single layer of InAs quantum dots (~ 2.6 ML coverage) in a GaAs well sandwiched by two AlGaAs barriers are incorporated into the tube wall as the gain media. As-fabricated microtube is supported by a 300-nm-thick Au pad, aiming to separate the tube from GaAs...
We have achieved a tubular microcavity embedded InAs quantum dots by rolling the U-shaped InGaAs/GaAs strained bilayer based on GaAs substrate. Subsequently, micro-photoluminescence spectra were investigated at room temperature. Four sharp and equidistant peaks can be obviously observed, which are recognized as whispering gallery modes. Besides, the maximum value of quality factor is ∼1200 at 6.59...
Photosensing of graphene oxide and reduced graphene oxide has been a popular research direction recently. However, there are seldom studies based on fabrics for wearable photosensors. Here we developed a wearable photosensor device based on reduced graphene oxide-coated fabrics with an obvious photosensing performance, which is very potential and practical for the development of smart clothing.
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