Field-Field and Photon-Photon Correlations of Light Scattered by Two Remote Two-Level InAs Quantum Dots on the Same Substrate

摘要

We report the measurement of field-field and photon-photon correlations of light scattered by two InAs quantum dots separated by ≈ 40 pun. Near 4 K a large fraction of photons can be scattered coherently by each quantum dot leading to one-photon interference at a beam splitter (visibility ≈ 20%). Simultaneously, two-photon interference is also observed (visibility ≈ 40%) due to the indistinguish-ability of photons scattered by the two different quantum emitters. We show how spectral diffusion accounts for the reduction in interference visibility through variations in photon flux.