Stimulated emissions in aligned CdS nanowires at room temperature |
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Authors: | Pan Anlian Liu Ruibin Yang Qing Zhu Yongchun Yang Guozhen Zou Bingsuo Chen Keqiu |
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Institution: | Micro-Nano Technologies Research Center, Hunan University, Changsha 410082, China. |
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Abstract: | Aligned CdS nanowires (NWs) were obtained through a simple thermal evaporation process with highly active CdS nanoparticles as the evaporation source. These NWs show prominent optical waveguides behavior under a continuous-wave (CW) laser excitation. Excitation intensity-dependent photoluminescence (PL) measurements show that these NWs exhibited both broad and supernarrow stimulated emission (lasing) under intense pulse optical excitation at room temperature. Raman scattering and time-resolved PL measurements were used to investigate the optical properties. The results indicated that the stimulated emission in these NWs involves the electron-hole plasma (EHP) and Farby-Perot (F-P) optical resonant processes at room temperature. |
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