Abstract
We demonstrate the coupling of single color centers in diamond to plasmonic and dielectric photonic structures to realize novel nanophotonic devices. Nanometer spatial control in the creation of single color centers in diamond is achieved by implantation of nitrogen atoms through high-aspect-ratio channels in a mica mask. Enhanced broadband single-photon emission is demonstrated by coupling nitrogen–vacancy centers to plasmonic resonators, such as metallic nanoantennas. Improved photon-collection efficiency and directed emission is demonstrated by solid immersion lenses and micropillar cavities. Thereafter, the coupling of diamond nanocrystals to the guided modes of micropillar resonators is discussed along with experimental results. Finally, we present a gas-phase-doping approach to incorporate color centers based on nickel and tungsten, in situ into diamond using microwave-plasma-enhanced chemical vapor deposition. The fabrication of silicon–vacancy centers in nanodiamonds by microwave-plasma-enhanced chemical vapor deposition is discussed in addition.
Highlights
Single quantum emitters coupled to plasmonic and dielectric microresonators hold promise for novel photonic devices, such as optical transistors [1], optical quantum memories [2,3] and controlled single-photon sources
An approach that is well suited to create single color centers in diamond with nanometer spatial control is the implantation of nitrogen ions through a mask [4]
We have performed a series of key experiments towards strong coupling of solid-state quantum emitters to plasmonic and dielectric optical resonators
Summary
Single quantum emitters coupled to plasmonic and dielectric microresonators hold promise for novel photonic devices, such as optical transistors [1], optical quantum memories [2,3] and controlled single-photon sources. Color centers in diamond need to be created in a well-defined way, and new color centers with desired emission and spin properties for quantum optics need to be identified. Both ion implantations as well as doping of diamond during CVD growth are of importance here. The remaining challenge here is the coupling of color centers to nanophotonic devices This is for two reasons: First, most of the emitters are relatively broadband. The controlled positioning of single color centers in diamond is realized with nanometer spatial precision by ion-beam implantation through nanometersized apertures and by fabricating plasmonic structures with hot spots around diamond nanocrystals
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