期刊
ACS PHOTONICS
卷 7, 期 9, 页码 2343-2349出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.0c00758
关键词
photonic crystal waveguide; quantum dot; single photons; resonant spectroscopy; nanophotonics; semiconductor heterostructure
类别
资金
- Danmarks Grundforskningsfond (DNRF
- Center for Hybrid Quantum Networks) [Hy-Q DNRF139]
- H2020 European Research Council (ERC
- SCALE)
- Styrelsen for Forskning og Innovation [5072-00016B QUANTECH]
- Bundesministerium fiir Bildung and Forschung (BMBF) [16KIS0867]
- Deutsche Forschungsgemeinschaft (DFG) [TRR 160]
- SNF [200020_156637]
- NCCR QSIT
Planar nanophotonic structures enable broadband, near-unity coupling of emission from quantum dots embedded within, thereby realizing ideal single-photon sources. The efficiency and coherence of the single-photon source is limited by charge noise, which results in the broadening of the emission spectrum. We report suppression of the noise by fabricating photonic crystal waveguides in a gallium arsenide membrane containing quantum dots embedded in a p-i-n diode. Local electrical contacts in the vicinity of the waveguides minimize the leakage current and allow fast electrical control (approximate to 4 MHz bandwidth) of the quantum dot resonances. Resonant linewidth measurements of 51 quantum dots coupled to the photonic crystal waveguides exhibit near transform-limited emission over a 6 nm wide range of emission wavelengths. Importantly, the local electrical contacts allow independent tuning of multiple quantum dots on the same chip, which together with the transform-limited emission are key components in realizing multiemitter-based quantum information processing.
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