On-demand positioning of a preselected quantum emitter on a fiber-coupled toroidal microresonator

Gregor, Markus; Henze, Rico; Schröder, Tim; Benson, Oliver
October 2009
Applied Physics Letters;10/12/2009, Vol. 95 Issue 15, p153110
Academic Journal
The coupling of a quantum emitter to the modes of a silica toroid is presented. A fiber taper is used to manipulate and transfer a preselected diamond nanocrystal onto the toroid. Optical coupling of few nitrogen vacancy (NV) color centers contained inside the nanocrystal to the resonator modes is demonstrated by detecting the fluorescence via a tapered optical fiber coupler. A clear antibunching in the photon correlation measurement is observed indicating emission from only six NV centers residing inside the nanocrystal. The latter is confirmed by a photoluminescence spectrum at liquid helium temperature resolving individual zero phonon lines.


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