Fig. 3: Quantum coherence measurements of the emitter in the cavity.
From: All-silicon quantum light source by embedding an atomic emissive center in a nanophotonic cavity
a Spectrum of the quantum emitter over a broad range of energy showing the zero-phonon line (ZPL) of the silicon emissive center and its phonon side band. b Spectrum of the quantum emitter using a high-resolution grating. The ZPL is located at 972.43 meV and has an intrinsic linewidth of 6.8 GHz. The dashed line corresponds to the instrument limit. c Second order autocorrelation measurements of the emission from the cavity under continuous excitation. The antibunching at zero delay confirms the successful spatial overlap of a single silicon emissive center with the nanophotonic cavity with an antibunching at zero delay g2(0) = 0.30 ± 0.07. d Second order autocorrelation measurements under pulsed excitation at a repetition rate of 10 MHz. Autocorrelation measurements are performed using a Hanbury-Brown and Twiss interferometer with superconducting nanowire single-photon detectors (see Supplementary Note 3).
