Fig. 3: Single QD positioning and coupling to corner state.
From: Single photon emitter deterministically coupled to a topological corner state
a, b Fluorescence images captured before and after the fabrication of the topological cavity, revealing the precise positioning of a single QD in the vicinity of the corner state. c The PL spectra of the QD as a function of temperature, measured across the corner state cavity. At 28 K, the QD is in resonance with the cavity. d Decay curves comparing the QD on resonance with the cavity (red) and the QD in bulk GaAs material (blue), revealing a Purcell factor of 3.7. e An intensity-correlation histogram obtained using a Hanbury Brown and Twiss setup, under above-band continuous wave (CW) excitation. The histogram demonstrates the antibunching behavior of the emitted single photons
