Lasing in single cadmium sulfide nanowire optical cavities
Lasing in single cadmium sulfide nanowire optical cavities
复制标题
DOI：
10.1021/nl050440u
复制
发表时间：
2005-05-01
期刊：
影响因子：
10.8
通讯作者：
Lieber, CM
中科院分区：
文献类型：
--
作者：
Agarwal, R;Barrelet, CJ;Lieber, CM
通过温度相关和时间分辨的光致发光（PL）测量，阐明了硫化镉（CdS）纳米线单腔中的激光机制。温度相关的PL研究揭示了丰富的光谱特征，并表明激子-激子相互作用是至关重要的激光高达75 K，而激子-声子过程占主导地位，在较高的温度。这些测量与温度和强度相关的寿命和阈值的研究表明，激光是由于激子的形成，而且，有效率，低阈值的纳米线激光器的设计的影响。
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.