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Semiconductor nanostructures such as nanowires or nanosheets are extremely tolerant to lattice constant variation and thus allow alloy composition to vary over a large range within a single substrate or structure. We demonstrate multi-color lasing or even a white laser from a single alloy nanostructure.
We report on our recent research on demonstrating the simultaneous lasing in red, green and blue from a single monolithic nanosheet. The careful adjustment of relative output intensities of these elemental colors leads to an overall white appearance from a single laser structure. Larger tolerance to mismatch at nanoscale offers unique opportunity of growing monolithic semiconductor alloy structures...
We report mid-infrared lasing around 3 μm from a single PbS subwavelength wire, with a cavity volume less than the wavelength cubed at 0.44 λ3. The maximal lasing temperature is 180 K under pulse operation.
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