Intrinsic and environmental effects on the interference properties of a high-performance quantum dot single-photon source | |
Article | |
关键词: NEAR-UNITY INDISTINGUISHABILITY; SOLID-STATE; MOLLOW TRIPLET; SEMICONDUCTOR; FLUORESCENCE; DEVICE; GENERATION; EMITTERS; BRIGHT; CAVITY; | |
DOI : 10.1103/PhysRevB.97.195432 | |
来源: SCIE |
【 摘 要 】
We report a joint experimental and theoretical study of the interference properties of a single-photon source based on a In(Ga)As quantum dot embedded in a quasiplanar GaAs microcavity. Using resonant laser excitation with a pulse separation of 2 ns, we find near-perfect interference of the emitted photons, and a corresponding indistinguishability of I = (99.61(-1.4)(+0.4))%. For larger pulse separations, quasiresonant excitation conditions, increasing pump power, or with increasing temperature, the interference contrast is progressively and notably reduced. We present a systematic study of the relevant dephasing mechanisms and explain our results in the framework of a microscopic model of our system. For strictly resonant excitation, we show that photon indistinguishability is independent of pump power, but strongly influenced by virtual phonon-assisted processes which are not evident in excitonic Rabi oscillations.
【 授权许可】
Free