Lasing in single cadmium sulfide nanowire optical cavities

2019-09-30 21:14:34

dependent exciton nanowire cavities lasing

责任者: Agarwal, Ritesh;Barrelet, Carl J.;Lieber, Charles M. 单位: Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, United States 来源出处: Nano Letters,2005,5(5):917-920 摘要: The mechanism of lasing in single cadmium sulfide (CdS) nanowire cavities was elucidated by temperature-dependent and time-resolved photoluminescence (PL) measurements. Temperature-dependent PL studies reveal rich spectral features and show that an exciton-exciton interaction is critical to lasing up to 75 K, while an exciton-phonon process dominates at higher temperatures. These measurements together with temperature and intensity dependent lifetime and threshold studies show that lasing is due to formation of excitons and, moreover, have implications for the design of efficient, low threshold nanowire lasers. © 2005 American Chemical Society. 关键词: Cadmium sulfide;Nanostructured materials;Photoluminescence;Thermal effects;Polarization;Single crystals;Catalysis;Fluorescence;Spectroscopic analysis;Optical cavities;Nanowires;Spectral features;Lasing