Photoneutralization of charges in GaAs quantum dot based entangled
photon emitters
- URL: http://arxiv.org/abs/2110.02346v3
- Date: Wed, 14 Feb 2024 11:48:30 GMT
- Title: Photoneutralization of charges in GaAs quantum dot based entangled
photon emitters
- Authors: Jingzhong Yang, Tom Fandrich, Frederik Benthin, Robert Keil, Nand Lal
Sharma, Weijie Nie, Caspar Hopfmann, Oliver G. Schmidt, Michael Zopf, Fei
Ding
- Abstract summary: We show that emission quenching can be actively suppressed by controlling the balance of free electrons and holes in the vicinity of the quantum dot.
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.
- Score: 0.923921787880063
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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%.
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