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- W3106410864 abstract "In the present work, the effect of resonant pumping schemes in improving the photon coherence is investigated on InAs/InGaAs/GaAs quantum dots emitting in the telecom C-band. The linewidths of transitions of multiple exemplary quantum dots are determined under above-band pumping and resonance fluorescence via Fourier-transform spectroscopy and resonance scans, respectively. The average linewidth is reduced from $9.74,mathrm{GHz}$ in above-band excitation to $3.50,mathrm{GHz}$ in resonance fluorescence underlining its superior coherence properties. Furthermore, the feasibility of coherent state preparation with a fidelity of $49.2,%$ is demonstrated, constituting a step towards on-demand generation of coherent, single C-band photons from quantum dots. Finally, two-photon excitation of the biexciton is investigated as a resonant pumping scheme. A deconvoluted single-photon purity value of $g^{(2)}_{mathrm{HBT}}(0)=0.072pm 0.104$ and a degree of indistinguishability of $V_{mathrm{HOM}}=0.894pm0.109$ are determined for the biexciton transition. This represents an important step towards fulfilling the prerequisites for quantum communication applications like quantum repeater schemes at telecom wavelength." @default.
- W3106410864 created "2020-11-23" @default.
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- W3106410864 date "2019-07-08" @default.
- W3106410864 modified "2023-10-17" @default.
- W3106410864 title "Coherence and indistinguishability of highly pure single photons from non-resonantly and resonantly excited telecom C-band quantum dots" @default.
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- W3106410864 doi "https://doi.org/10.1063/1.5095196" @default.
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