Single photon emission and single spin coherence of a nitrogen vacancy centre encapsulated in silicon nitride

28 Jan 2020  ·  Smith Joe, Monroy-Ruz Jorge, Rarity John G., Balram Krishna C. ·

Finding the right material platform for engineering efficient photonic interfaces to solid state emitters has been a long-standing bottleneck for scaling up solid state quantum systems. In this work, we demonstrate that nitrogen-rich silicon nitride, with its low background auto-fluorescence at visible wavelengths, is a viable quantum photonics platform by showing that nitrogen vacancy centres embedded in nanodiamonds preserve both their quantum optical and spin properties post-encapsulation... Given the variety of high-performance photonic components already demonstrated in silicon nitride, our work opens up a new avenue for building integrated photonic circuits using solid state emitters. read more

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Applied Physics Optics Quantum Physics