Quantum dot microdrop laser
Quantum dot microdrop laser
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DOI：
10.1021/nl080661a
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发表时间：
2008-06-01
期刊：
影响因子：
10.8
通讯作者：
Wang, L. J.
中科院分区：
文献类型：
--
作者：
Schaefer, J.;Mondia, J. P.;Wang, L. J.
本文报道了含有CdSe/ZnS双量子点的孤立球形液体微腔的单模和多模激光输出。假设量子点分布均匀，激光的密度比以前证明的或理论预测的低2个数量级以上。大小在10 μ m和40 μ m之间的带电液滴被电动地悬浮和光学地泵浦。由于高Q腔模式，从垂直于泵浦光束的定向发射测量低阈值的大量激光信号。
We report single-mode and multimode lasing from isolated spherical liquid microcavities containing CdSe/ZnS nanocrystal quantum dots. Lasing is observed at densities more than 2 orders of magnitude lower than previously demonstrated or theoretically predicted, assuming a uniform nanocrystal quantum dot distribution. Charged droplets, between 10 and 40 mu m in size, are electrodynamically levitated and optically pumped. Substantial laser signals at low thresholds are measured from the directional emission normal to the pump beam, owing to the high Q cavity modes.