Abstract.
We discuss our recent experiments that aim at the realization of coupling between a nano-emitter that is placed at the extremity of a sharp glass-fiber tip and a high-Q whispering-gallery mode. We quantify the influence of the tip using different probes and modes of a microsphere with different quality factors and mode extensions. Our measurements show that a micron-sized tip results in a substantial perturbation of the modes. On the contrary, by using a tip of diameter about 100 nm it should be possible to couple a nanoparticle to the most-confined modes of a microsphere without spoiling quality factors even as high as 108.
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Received: 10 August 2001 / Revised version: 17 October 2001 / Published online: 23 November 2001
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Götzinger, S., Benson, . & Sandoghdar, V. Towards controlled coupling between a high-Q whispering-gallery mode and a single nanoparticle. Appl Phys B 73, 825–828 (2001). https://doi.org/10.1007/s003400100742
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DOI: https://doi.org/10.1007/s003400100742