Research Institute for Electronic Science, Hokkaido University , Sapporo, Hokkaido 001-0021, Japan.
Nano Lett. 2011 Oct 12;11(10):4362-5. doi: 10.1021/nl2024867. Epub 2011 Sep 15.
Highly efficient coupling of photons from nanoemitters into single-mode optical fibers is demonstrated using tapered fibers. A percentage (7.4 ± 1.2%) of the total emitted photons from single CdSe/ZnS nanocrystals were coupled into a 300 nm diameter tapered fiber. The dependence of the coupling efficiency on the taper diameter was investigated and the coupling efficiency was found to increase exponentially with decreasing diameter. This method is very promising for nanoparticle sensing and single-photon sources.
利用锥形光纤实现了纳米发射器发射的光子与单模光纤的高效耦合。从单个 CdSe/ZnS 纳米晶体发射的总光子中，有 7.4%±1.2%被耦合到直径为 300nm 的锥形光纤中。研究了耦合效率对锥形光纤直径的依赖关系，发现耦合效率随直径的减小呈指数增加。该方法在纳米颗粒传感和单光子源方面具有很大的应用前景。
