Kirsanske, Gabija Thyrrestrup, Henri Daveau, Raphael S. Dreessen, Chris L. Pregnolato, Tommaso Midolo, Leonardo Tighineanu, Petru Javadi, Alisa Stobbe, Soren Schott, Ruediger Ludwig, Arne Wieck, Andreas D. Park, Suk In Song, Jin D. Kuhlmann, Andreas V. Sollner, Immo Lobl, Matthias C. Warburton, Richard J. Lodahl, Peter 2024-01-20T00:30:19Z 2024-01-20T00:30:19Z 2021-09-03 2017-10-19 2469-9950 https://pubs.kist.re.kr/handle/201004/122153 We demonstrate a high-purity source of indistinguishable single photons using a quantum dot embedded in a nanophotonic waveguide. The source features a near-unity internal coupling efficiency and the collected photons are efficiently coupled off chip by implementing a taper that adiabatically couples the photons to an optical fiber. By quasiresonant excitation of the quantum dot, we measure a single-photon purity larger than 99.4% and a photon indistinguishability of up to 94 +/- 1% by using p-shell excitation combinedwith spectral filtering to reduce photon jitter. A temperature-dependent study allows pinpointing the residual decoherence processes, notably the effect of phonon broadening. Strict resonant excitation is implemented as well as another means of suppressing photon jitter, and the additional complexity of suppressing the excitation laser source is addressed. The paper opens a clear pathway towards the long-standing goal of a fully deterministic source of indistinguishable photons, which is integrated on a planar photonic chip. English AMER PHYSICAL SOC NOISE Indistinguishable and efficient single photons from a quantum dot in a planar nanobeam waveguide Article 10.1103/PhysRevB.96.165306 1 Physical Review B, v.96, no.16 Physical Review B 96 16 scie scopus 000413276300001 2-s2.0-85038122113 Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Materials Science Physics Article NOISE Indistinguishable Single photon InAs Quantum dots