Details
| Original language | English |
|---|---|
| Article number | 115301 |
| Journal | Physical Review B |
| Volume | 105 |
| Issue number | 11 |
| Publication status | Published - 3 Mar 2022 |
Abstract
Keywords
- quant-ph, cond-mat.mtrl-sci, physics.optics
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 105, No. 11, 115301, 03.03.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Photoneutralization of charges in GaAs quantum dot based entangled photon emitters
AU - Yang, Jingzhong
AU - Fandrich, Tom
AU - Benthin, Frederik
AU - Keil, Robert
AU - Sharma, Nand Lal
AU - Nie, Weijie
AU - Hopfmann, Caspar
AU - Schmidt, Oliver G.
AU - Zopf, Michael
AU - Ding, Fei
N1 - Funding Information: The authors thank X. Cao for fruitful discussion and gratefully acknowledge the funding by the German Federal Ministry of Education and Research (BMBF) within the project Q.Link.X (16KIS0869) and QR.X (16KISQ015), the European Research Council (QD-NOMS GA715770) and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy (EXC-2123) QuantumFrontiers (390837967).
PY - 2022/3/3
Y1 - 2022/3/3
N2 - Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent of photonic quantum technologies. They are known for the ability to generate discrete photonic states on-demand with low multiphoton emission, near-unity entanglement fidelity, and high single photon indistinguishability. However, quantum dots typically suffer from luminescence blinking, lowering the efficiency of the source and hampering their scalable application in quantum networks. In this paper, we investigate and adjust the intermittence of the neutral exciton emission in a GaAs/AlGaAs quantum dot under two-photon resonant excitation of the neutral biexciton. We investigate the spectral and quantum optical response of the quantum dot emission to an additional wavelength tunable gate laser, revealing blinking caused by the intrinsic Coulomb blockade due to charge capture processes. Our finding demonstrates that the emission quenching can be actively suppressed by controlling the balance of free electrons and holes in the vicinity of the quantum dot and thereby significantly increasing the quantum efficiency by 30%.
AB - Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent of photonic quantum technologies. They are known for the ability to generate discrete photonic states on-demand with low multiphoton emission, near-unity entanglement fidelity, and high single photon indistinguishability. However, quantum dots typically suffer from luminescence blinking, lowering the efficiency of the source and hampering their scalable application in quantum networks. In this paper, we investigate and adjust the intermittence of the neutral exciton emission in a GaAs/AlGaAs quantum dot under two-photon resonant excitation of the neutral biexciton. We investigate the spectral and quantum optical response of the quantum dot emission to an additional wavelength tunable gate laser, revealing blinking caused by the intrinsic Coulomb blockade due to charge capture processes. Our finding demonstrates that the emission quenching can be actively suppressed by controlling the balance of free electrons and holes in the vicinity of the quantum dot and thereby significantly increasing the quantum efficiency by 30%.
KW - quant-ph
KW - cond-mat.mtrl-sci
KW - physics.optics
UR - http://www.scopus.com/inward/record.url?scp=85126466523&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2110.02346
DO - 10.48550/arXiv.2110.02346
M3 - Article
VL - 105
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 11
M1 - 115301
ER -