3/21/2024 0 Comments Nitro software revenue 2017The overall Purcell factor F P = 2.0 translates to a Purcell factor for the zero phonon line (ZPL) of F P ZPL ∼ 30 and an increase in the ZPL emission probability from about 3% to 46%. We demonstrate a clear change in the lifetime for multiple individual NV centers on tuning both the cavity frequency and antinode position, a Purcell effect. Here, we present a microcavity scheme that uses minimally processed diamond, thereby preserving the high quality of the starting material and a tunable microcavity platform. In practice, it has proved difficult to implement this concept: Photonic engineering hinges on nanofabrication, yet it is notoriously difficult to process diamond without degrading the NV centers. In principle, all three problems can be addressed with a resonant microcavity. ![]() ![]() However, a NV center even in high-quality single-crystalline material is a very poor source of single photons: Extraction out of the high-index diamond is inefficient, the emission of coherent photons represents just a few percent of the total emission, and the decay time is large. The nitrogen-vacancy (NV) center in diamond has an optically addressable, highly coherent spin.
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