Low-Threshold Nanowire Laser Based on Composition-Symmetric Semiconductor Nanowires

Low-threshold nanoscale lasers are attractive for their promising applications in highly integrated photonic devices and systems. Here we report the controllable growth of composition-symmetric CdS x Se1–x nanowires by using a multistep thermal evaporation route with moving sources. Microstructure a...

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Bibliographic Details
Published in:Nano letters 2013-03, Vol.13 (3), p.1251-1256
Main Authors: Guo, Pengfei, Zhuang, Xiujuan, Xu, Jinyou, Zhang, Qinglin, Hu, Wei, Zhu, Xiaoli, Wang, Xiaoxia, Wan, Qiang, He, Pengbin, Zhou, Hong, Pan, Anlian
Format: Article
Language:English
Subjects:
Color
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Evaporation
Exact sciences and technology
Illumination
Lasers
Lasing
Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
Materials science
Microstructure
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanowires
Physics
Quantum wires
Semiconductors
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Wire
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Summary:Low-threshold nanoscale lasers are attractive for their promising applications in highly integrated photonic devices and systems. Here we report the controllable growth of composition-symmetric CdS x Se1–x nanowires by using a multistep thermal evaporation route with moving sources. Microstructure analyses reveal the obtained wires are high-quality single crystals with the composition gradually changed from the center toward their both ends. Under laser illumination, these wires exhibit symmetrical color distribution along the length direction, with red at the center and green at the both ends. Optically pumped lasing is realized at room temperature using these composition-symmetric nanowires, with the threshold several times lower than that of composition-homogeneous wires. This new nanowire structure will have potential applications as low-threshold nanoscale lasers in integrated nanophotonics.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl3047893