High-quality single-crystal CdSe nanoribbons and their optical properties |
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| Authors: | D D Hou Y K Liu J A Zapien Y Y Shan and S T Lee |
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| Affiliation: | (1) Department of Physics, Yunnan Normal University, Kunming, 650092, China;(2) Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Material Science, City University of Hong Kong, Hong Kong SAR, China |
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| Abstract: | Large-scale synthesis of single-crystal CdSe nanoribbons is achieved by a modified thermal evaporation method,in which two-step-thermal-evaporation is used to control CdSe sources' evaporation.The synthesized CdSe nanoribbons are usually several micrometers in width,50 run in thickness,and tens to several hundred micrometers in length.Studies have shown that high-quality CdSe nanoribbons with regular shapes can be obtained by this method.Room-temperature photoluminescence indicates that the lasing emission at 710 nm has been observed under optical pumping (266 nm) at power densities of 25-153 kW/cm2.The full width half maximum (FWHM) of the lasing mode is 0.67 nm |
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| Keywords: | optical properties lasing mode FWHM full half maximum power densities of photoluminescence emission optical pumping Studies regular method tens length thickness synthesized width evaporation |
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