Stimulated emissions in aligned CdS nanowires at room temperature
Stimulated emissions in aligned CdS nanowires at room temperature
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DOI：
10.1021/jp055164m
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发表时间：
2005-12-29
影响因子：
3.3
通讯作者：
Chen, KQ
中科院分区：
文献类型：
--
作者：
Pan, AL;Liu, RB;Chen, KQ
以高活性的CdS纳米粒子为蒸发源，通过简单的热蒸发工艺制备了有序的CdS纳米线。这些纳米线在连续波（CW）激光激发下表现出突出的光波导行为。激发强度相关的光致发光（PL）的测量结果表明，这些纳米线表现出宽和超窄的受激发射（激射）在强脉冲光激发下，在室温下。拉曼散射和时间分辨PL测量被用来研究的光学性质。结果表明，这些纳米线中的受激辐射在室温下涉及电子-空穴等离子体（EHP）和Farby-Perot（F-P）光学共振过程。
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.