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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.
A record level of spatial-averaged internal net gain larger than 300 dB/cm is demonstrated at 1532 nm from a single-crystal Erbium Chloride Silicate nanowire. Signal enhancement at small signal regime was resolved along the entire nanowire. Pump power dependence of gain saturation are studied.
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