Coupling of optical far fields into apertureless plasmonic nanofiber tips
Coupling of optical far fields into apertureless plasmonic nanofiber tips
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DOI：
10.1103/physreva.88.063830
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发表时间：
2013-08
影响因子：
2.9
通讯作者：
D. Auwarter;C. Zimmermann;S. Slama
中科院分区：
文献类型：
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作者：
D. Auwarter;C. Zimmermann;S. Slama
本文报道了用激光束侧面照射在镀金针尖上激发表面等离子体激元，以及表面等离子体激元与光纤的耦合。测量结果表明，耦合效率对入射角有很强的依赖性，最大耦合效率约为百分之几。此外，光纤尖端被用作扫描探针装置，用于测量聚焦激光束的束腰。这项工作的动机是在冷原子的量子光学实验中使用这种等离子体纳米纤维尖端。
This paper reports on the excitation of surface plasmons on gold-coated nanofiber tips by side illumination with a laser beam and the coupling of the surface plasmons to the optical fiber. The measurements show a strong dependence of the coupling efficiency on the incidence angle with a maximum coupling efficiency on the order of a few percent. Moreover, the fiber tip was used as a scanning probe device for measuring the beam waist of a focused laser beam. This work is motivated by the goal to use such plasmonic nanofiber tips in quantum optics experiments with cold atoms.