Spontaneous emission of luminescent material is strongly dependent on the surrounding\nelectromagnetic environment. To enhance the emission rate of a single-photon emitter, we proposed\na wire-groove resonant nanocavity around the single-photon emitter. An InGaAs quantum dot\nembedded in a GaAs nanowire was employed as a site-control single-photon emitter. The nanoscale\ncavity built by a wire-groove perpendicular to the quantum dot with an extremely narrow width\nof 10 nm exhibited an extremely small volume of 10*40*259 nm^3. Theoretical analysis showed\nthat the emission rate of the quantum dot was dramatically enhanced by 617x due to the Purcell\neffect induced by the wire-groove cavity. A fast single-photon emitter with a rate of 50.2 GHz can be\nobtained that speeds up the data rate of the single-photon emitter. This ultrafast single-photon source\nwould be of great significance in quantum information systems and networks.
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