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arXiv · 1604.02324

Harvesting, coupling and control of single exciton coherences in photonic waveguide antennas

Q. Mermillod·T. Jakubczyk·V. Delmonte·A. Delga·E. Peinke·J-M. Gérard·J. Claudon·J. Kasprzak
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Abstract

We perform coherent non-linear spectroscopy of individual excitons strongly confined in single InAs quantum dots (QDs). The retrieval of their intrinsically weak four-wave mixing (FWM) response is enabled by a one-dimensional dielectric waveguide antenna. Compared to a similar QD embedded in bulk media, the FWM detection sensitivity is enhanced by up to four orders of magnitude, over a broad operation bandwidth. Three-beam FWM is employed to investigate coherence and population dynamics within individual QD transitions. We retrieve their homogenous dephasing in a presence of spectral wandering. Two-dimensional FWM reveals off-resonant Förster coupling between a pair of distinct QDs embedded in the antenna. We also detect a higher order QD non-linearity (six-wave mixing) and use it to coherently control the FWM transient. Waveguide antennas enable to conceive multi-color coherent manipulation schemes of individual emitters.

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Q. Mermillod, T. Jakubczyk, V. Delmonte, A. Delga, E. Peinke, J-M. Gérard, J. Claudon, J. Kasprzak. 2016-04-08. Harvesting, coupling and control of single exciton coherences in photonic waveguide antennas. https://doi.org/10.1103/physrevlett.116.163903

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