High-quality single-crystal CdSe nanoribbons and their optical properties
High-quality single-crystal CdSe nanoribbons and their optical properties作者机构:Department of Physics Yunnan Normal University Kunming 650092 China Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Material Science City University of Hong Kong Hong Kong SAR China
出 版 物:《Optoelectronics Letters》 (光电子快报(英文版))
年 卷 期:2008年第4卷第3期
页 面:161-164页
核心收录:
学科分类:07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0702[理学-物理学]
基 金:National Natural Science Foundation of China (No. 10764005) Natural Science Foundation of Yunnan Province (No. 06A0025Q, 2007PY01-41) Educational Council of Yunnan Province (No. 5Z0098A, 06Y091) the Research Grants Council of the Hong Kong SAR, China [Project No. CityU 3/01C (8730016)] Strategic Research Grant of the City Uni- versity of Hong Kong [Project No. 7001175]
摘 要: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 nm 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 photolumines-cence indicates that the lasing emission at 710 nm has been observed under optical pumping (266 nm) at power densities of 25-153 kW/cm^2. The full width half maximum (FWHM) of the lasing mode is 0.67 nm