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Article Dans Une Revue Physical Review B Année : 2022

Quantitative analysis of the blue-green single-photon emission from a quantum dot in a thick tapered nanowire

Résumé

Quantum dots acting as single photon emitters in the blue-green range are fabricated and characterized at cryogenic temperature. They consist in CdSe dots inserted in (Zn,Mg)Se nanowires with a thick shell. Photoluminescence spectra, decay curves and autocorrelation functions were measured under nonresonant continuous-wave and pulsed excitation. An analytical approach is applied simultaneously to the decay curves and correlation functions. It allows a quantitative description of how these two quantities are affected by the exciton rise due to biexciton feeding, the bright exciton decay, the effect of the dark exciton, and the re-excitation between two laser pulses. Linewidths at our limit of resolution (200 µeV) are recorded. The reported correlation counts vary from a full control by re-excitation from traps, to a small contribution of re-excitation by mobile carriers or other QDs, as low as 5%.
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Dates et versions

hal-03648910 , version 1 (22-04-2022)
hal-03648910 , version 2 (05-05-2022)
hal-03648910 , version 3 (18-11-2022)
hal-03648910 , version 4 (15-02-2023)

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Saransh Raj Gosain, Edith Bellet-Amalric, Eric Robin, Martien den Hertog, Gilles Nogues, et al.. Quantitative analysis of the blue-green single-photon emission from a quantum dot in a thick tapered nanowire. Physical Review B, 2022, 106 (23), pp.235301. ⟨10.1103/PhysRevB.106.235301⟩. ⟨hal-03648910v4⟩
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