基于胶体CdSe/ZnS量子点的高效硅纳米盘激光器。
High efficiency silicon nanodisk laser based on colloidal CdSe/ZnS QDs.
作者信息
Wang Yao-Chen, Yuan Chi-Tsu, Yang Yi-Chun, Wu Meng-Chyi, Tang Jau, Shih Min-Hsiung
机构信息
Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei, Taiwan.
出版信息
Nano Rev. 2011;2. doi: 10.3402/nano.v2i0.7275. Epub 2011 Jul 22.
INTRODUCTION
Using colloidal CdSe/ZnS quantum dots in the submicron-sized silicon disk cavity, we have developed a visible wavelength nanodisk laser that operates under extremely low threshold power at room temperature.
METHODS
Time-resolved photoluminescence (PL) of QDs; nanodisk by e-beam lithography.
RESULTS
Observation of lasing action at 594 nm wavelength for quantum dots on a nanodisk (750 nm in diameter) cavity and an ultra-low threshold of 2.8 µW.
CONCLUSION
From QD concentration dependence studies we achieved nearly sevenfold increase in spontaneous emission (SE) rate. We have achieved high efficient and high SE coupling rate in such a QD nanodisk laser.
引言
通过在亚微米尺寸的硅盘腔中使用胶体CdSe/ZnS量子点，我们开发了一种在室温下以极低阈值功率运行的可见波长纳米盘激光器。
方法
量子点的时间分辨光致发光（PL）；通过电子束光刻制作纳米盘。
结果
观察到直径750nm的纳米盘腔上的量子点在594nm波长处的激光作用以及2.8µW的超低阈值。
结论
通过量子点浓度依赖性研究，我们实现了自发发射（SE）速率近七倍的增加。我们在这种量子点纳米盘激光器中实现了高效和高SE耦合速率。
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