2023/06/18 by Richard Waltrich, Waltrich, Richard, Marco Klotz +5 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Applied Physics (physics.app-ph) #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Nonlinear Optical Materials Studies #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2306.10524
openalex publication_date 2023/06/18 · openalex created_date 2023/06/22 · openalex updated_date 2026/07/28
The generation of indistinguishable photons is a key requirement for solid-state quantum emitters as a viable source for applications in quantum technologies. Restricting the dimensions of the solid-state host to a size well below the wavelength of light emitted by a defect-center enables efficient external optical coupling, for example for hybrid integration into photonic devices. However, stringent restrictions on the host dimensions result in severe limitations on the spectral properties reducing the indistinguishability of emitted photons. Here, we demonstrate two-photon interference from two negatively-charged Silicon-Vacancy centers located in remote nanodiamonds. The Hong-Ou-Mandel interference efficiency reaches 61% with a coalescence time window of 0.35 ns. We furthermore show a high yield of pairs of Silicon-Vacancy centers with indistinguishable optical transitions. Therefore, our work opens new paths in hybrid quantum technology based on indistinguishable single-photon emitters in nanodiamonds.