TY - JOUR
T1 - On-demand semiconductor single-photon source with near-unity indistinguishability
AU - He, Yu Ming
AU - He, Yu
AU - Wei, Yu Jia
AU - Wu, Dian
AU - Atatüre, Mete
AU - Schneider, Christian
AU - Höfling, Sven
AU - Kamp, Martin
AU - Lu, Chao Yang
AU - Pan, Jian Wei
PY - 2013/3
Y1 - 2013/3
N2 - Single-photon sources based on semiconductor quantum dots offer distinct advantages for quantum information, including a scalable solid-state platform, ultrabrightness and interconnectivity with matter qubits. A key prerequisite for their use in optical quantum computing and solid-state networks is a high level of efficiency and indistinguishability. Pulsed resonance fluorescence has been anticipated as the optimum condition for the deterministic generation of high-quality photons with vanishing effects of dephasing. Here, we generate pulsed single photons on demand from a single, microcavity-embedded quantum dot under s-shell excitation with 3 ps laser pulses. The π pulse-excited resonance-fluorescence photons have less than 0.3% background contribution and a vanishing two-photon emission probability. Non-postselective Hong-Ou-Mandel interference between two successively emitted photons is observed with a visibility of 0.97(2), comparable to trapped atoms and ions. Two single photons are further used to implement a high-fidelity quantum controlled-NOT gate.
AB - Single-photon sources based on semiconductor quantum dots offer distinct advantages for quantum information, including a scalable solid-state platform, ultrabrightness and interconnectivity with matter qubits. A key prerequisite for their use in optical quantum computing and solid-state networks is a high level of efficiency and indistinguishability. Pulsed resonance fluorescence has been anticipated as the optimum condition for the deterministic generation of high-quality photons with vanishing effects of dephasing. Here, we generate pulsed single photons on demand from a single, microcavity-embedded quantum dot under s-shell excitation with 3 ps laser pulses. The π pulse-excited resonance-fluorescence photons have less than 0.3% background contribution and a vanishing two-photon emission probability. Non-postselective Hong-Ou-Mandel interference between two successively emitted photons is observed with a visibility of 0.97(2), comparable to trapped atoms and ions. Two single photons are further used to implement a high-fidelity quantum controlled-NOT gate.
UR - https://www.scopus.com/pages/publications/84874664334
U2 - 10.1038/nnano.2012.262
DO - 10.1038/nnano.2012.262
M3 - 文章
C2 - 23377455
AN - SCOPUS:84874664334
SN - 1748-3387
VL - 8
SP - 213
EP - 217
JO - Nature Nanotechnology
JF - Nature Nanotechnology
IS - 3
ER -