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Pan, Anlian; Zhou, Weichang; Leong, Eunice S. P; Liu, Ruibin; Chin, Alan H; Zou, Bingsuo; Ning, C. Z
Nano letters, 02/2009, Letnik: 9, Številka: 2Journal Article
By controlling local substrate temperature in a chemical vapor deposition system, we have successfully achieved spatial composition grading covering the complete composition range of ternary alloy CdSSe nanowires on a single substrate of 1.2 cm in length. Spatial photoluminescence scan along the substrate length shows peak wavelength changes continuously from ∼500 to ∼700 nm. Furthermore, we show that under strong optical pumping, every spot along the substrate length displays lasing behavior. Thus our nanowire chip provides a spatially continuously tunable laser with a superbroad wavelength tuning range, unmatched by any other available semiconductor-based technology.
