Colloidal quantum dots in all-dielectric high-Q pillar microcavities
Colloidal quantum dots in all-dielectric high-Q pillar microcavities
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DOI：
10.1021/nl071812x
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发表时间：
2007-09-01
期刊：
影响因子：
10.8
通讯作者：
Bratschitsch, Rudolf
中科院分区：
文献类型：
--
作者：
Kahl, Matthias;Thomay, Tim;Bratschitsch, Rudolf
我们利用聚焦离子束铣削技术，以嵌入式胶体CdSe/ZnS量子点或量子棒作为光发射体，制备了全介质高Q光学柱谐振器。观察到三维光限制和不同的柱微腔模式。从波导模型的模式模式和它们的光谱位置的结果与实验数据非常吻合。具有椭圆形横截面的腔在短轴方向上显示出比相同横截面面积的圆形谐振器更高的品质因数。
We have fabricated all-dielectric high-Q optical pillar resonators with embedded colloidal CdSe/ZnS quantum dots or rods as light emitters by focused ion beam milling. Three-dimensional light confinement and distinct pillar microcavity modes are observed. Results from a waveguide model for the mode patterns and their spectral positions are in excellent agreement with the experimental data. Cavities with elliptical cross sections show higher quality factors in the short axis direction than do circular resonators of the same cross-sectional area.