Vapor growth and interfacial carrier dynamics of high-quality CdS-CdSSe-CdS axial nanowire heterostructures

We realize the controlled growth of CdS-CdSSe-CdS axial nanowire heterostructures with highly crystallized and composition sharp interface. Optically pumped dual-wavelength lasing is demonstrated at room temperature based on these unique nanowire heterostructures. Time-resolved PL measurements reveal the energy transfer from the CdS segment to the CdSSe segment, which plays important roles on the lasing activity of the heterostructures.135