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Multi-wave coherent control of a solid-state single emitter

Fras, F., Mermillod, Q., Nogues, G., Hoarau, C., Schneider, C., Kamp, M., Höfling, S., Langbein, Wolfgang Werner and Kasprzak, J. 2016. Multi-wave coherent control of a solid-state single emitter. Nature Photonics 10 (3) , pp. 155-158. 10.1038/nphoton.2016.2

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Coherent control of individual two-level systems is at the heart of any quantum information protocol. In solids1, 2, 3, 4, 5, 6, two-level systems generated by bound electron–hole excitonic states, trapped in semiconductor quantum dots, display a robust coupling with light, enabling their optical manipulation via avant-garde approaches of nonlinear spectroscopy7, 8. Here, we develop a novel toolbox for coherent control of a quantum dot exciton based on the nonlinear wave-mixing responses, which are enhanced by a photonic nanostructure. By employing three, short, resonant laser pulses, we show that we can manipulate, at will, the intrinsic coherence of the quantum dot dipole and therefore engineer the spectro-temporal shape of its coherent emission. Multi-pulse quantum control sequences, which have been successful in NMR spectroscopy and quantum computation9, can now be applied to optically active solid-state quantum bits with application in high-order nonlinear spectroscopy, ultrafast quantum optoelectronics and spread spectrum technology at the single emitter level.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Nature Publishing Group
ISSN: 1749-4885
Date of First Compliant Deposit: 6 July 2017
Date of Acceptance: 25 December 2015
Last Modified: 05 Jul 2019 10:49

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