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arXiv · 1710.09732

Resonance fluorescence revival in a voltage-controlled semiconductor quantum dot

Antoine Reigue·Aristide Lemaître·Carmen Gomez Carbonell·Christian Ulysse·Kamel Merghem·Stéphane Guilet·Richard Hostein·Valia Voliotis
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Abstract

We demonstrate systematic resonance fluorescence recovery with near-unity emission efficiency in single quantum dots embedded in a charge-tunable device in a wave-guiding geometry. The quantum dot charge state is controlled by a gate voltage, through carrier tunneling from a close-lying Fermi sea, stabilizing the resonantly photocreated electron-hole pair. The electric field cancels out the charging/discharging mechanisms from nearby traps toward the quantum dots, responsible for the usually observed inhibition of the resonant fluorescence. Fourier transform spectroscopy as a function of the applied voltage shows a strong increase of the coherence time though not reaching the radiative limit. These charge controlled quantum dots act as quasi-perfect deterministic single-photon emitters, with one laser pulse converted into one emitted single photon.

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Antoine Reigue, Aristide Lemaître, Carmen Gomez Carbonell, Christian Ulysse, Kamel Merghem, Stéphane Guilet, Richard Hostein, Valia Voliotis. 2017-10-26. Resonance fluorescence revival in a voltage-controlled semiconductor quantum dot. https://doi.org/10.1063/1.5010757

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