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Title: Stimulated emission of CdS nanowires grown by thermal evaporation
Authors: Pan, H. 
Xing, G.
Ni, Z.
Ji, W. 
Feng, Y.P. 
Tang, Z. 
Chua, D.H.C. 
Lin, J.
Shen, Z.
Issue Date: 2007
Source: Pan, H., Xing, G., Ni, Z., Ji, W., Feng, Y.P., Tang, Z., Chua, D.H.C., Lin, J., Shen, Z. (2007). Stimulated emission of CdS nanowires grown by thermal evaporation. Applied Physics Letters 91 (19) : -. ScholarBank@NUS Repository.
Abstract: High-quality CdS nanowires with wurtzite structure were produced by thermal evaporation of CdS powder. The nanowires were core-shell structures, consisting of crystalline core and amorphous/polycrystal shell. The intensity of the second-order longitudinal phonon mode in the Raman spectrum of the CdS nanowires is higher than that of the first-order mode due to exciton-phonon coupling. The photoluminescence of the CdS nanowires is power dependent, and the photoluminescence peak at 516.5 nm becomes narrower with increase in excitation power, indicating the stimulated emission characteristics of CdS nanowires. The population inversion generated by two-photon absorption is mainly attributed to the occurrence of stimulated emission. © 2007 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.2807840
Appears in Collections:Staff Publications

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