Two-photon interference from the resonance fluorescence of a single quantum dot in a microcavity

In our work we have used purely resonant continuous-wave laser excitation of a single quantum dot inside a high quality microcavity. To ensure Fourier transform-limited photon emission with negligible background we use an orthogonal excitation and detection technique and stabilized low-temperature operation at T ~ 10 K. We also benefit from the Purcell effect which leads to a reduction of the radiative lifetime T₁, thus reducing the impact of possible phonon dephasing processes.