Journal
NANO LETTERS
Volume 18, Issue 11, Pages 6892-6897Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b02794
Keywords
Integrated quantum photonic circuits; quantum dot; SNSPD; Hanbury-Brown and Twiss; resonance fluorescence; on-chip quantum optics
Categories
Funding
- DFG [MI 500/29-1, SI 704/10-1]
- Ministry of Science, Research and Arts Baden-Wurttemberg
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Fully integrated quantum photonic circuits show a clear advantage in terms of stability and scalability compared to tabletop implementations. They will constitute a fundamental breakthrough in integrated quantum technologies, as a matter of example, in quantum simulation and quantum computation. Despite the fact that only a few building blocks are strictly necessary, their simultaneous realization is highly challenging. This is especially true for the simultaneous implementation of all three key components on the same chip: single photon sources, photonic logic, and single-photon detectors. Here, we present a fully integrated Hanbury-Brown and Twiss setup on a micrometer-sized footprint consisting of a GaAs waveguide embedding quantum dots as single-photon sources, a waveguide beamsplitter, and two superconducting nanowire single-photon detectors. This enables a second-order correlation measurement on the single-photon level under both continuous-wave and pulsed resonant excitation. The presented proof-of-principle experiment proves the simultaneous realization and operation of all three key building blocks and therefore a major step towards fully integrated quantum optical chips.
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