Near Transform-Limited Quantum Dot Linewidths in a Broadband Photonic Crystal Waveguide
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Near Transform-Limited Quantum Dot Linewidths in a Broadband Photonic Crystal Waveguide. / Pedersen, Freja T.; Wang, Ying; Olesen, Cecilie T.; Scholz, Sven; Wieck, Andreas D.; Ludwig, Arne; LObl, Matthias C.; Warburton, Richard J.; Midolo, Leonardo; Uppu, Ravitej; Lodahl, Peter.
In: ACS Photonics, Vol. 7, No. 9, 16.09.2020, p. 2343-2349.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Near Transform-Limited Quantum Dot Linewidths in a Broadband Photonic Crystal Waveguide
AU - Pedersen, Freja T.
AU - Wang, Ying
AU - Olesen, Cecilie T.
AU - Scholz, Sven
AU - Wieck, Andreas D.
AU - Ludwig, Arne
AU - LObl, Matthias C.
AU - Warburton, Richard J.
AU - Midolo, Leonardo
AU - Uppu, Ravitej
AU - Lodahl, Peter
PY - 2020/9/16
Y1 - 2020/9/16
N2 - 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.
AB - 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.
KW - photonic crystal waveguide
KW - quantum dot
KW - single photons
KW - resonant spectroscopy
KW - nanophotonics
KW - semiconductor heterostructure
KW - EMISSION
U2 - 10.1021/acsphotonics.0c00758
DO - 10.1021/acsphotonics.0c00758
M3 - Journal article
VL - 7
SP - 2343
EP - 2349
JO - ACS Photonics
JF - ACS Photonics
SN - 2330-4022
IS - 9
ER -
ID: 249904061