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arXiv · 1909.02440

Deterministic assembly of a charged quantum dot-micropillar cavity device

P. Hilaire·C. Millet·J. C. Loredo·C. Antón·A. Harouri·A. Lemaître·I. Sagnes·N. Somaschi O. Krebs·P. Senellart·L. Lanco
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Abstract

Developing future quantum communication may rely on the ability to engineer cavity-mediated interactions between photons and solid-state artificial atoms, in a deterministic way. Here, we report a set of technological and experimental developments for the deterministic coupling between the optical mode of a micropillar cavity and a quantum dot trion transition. We first identify a charged transition through in-plane magnetic field spectroscopy, and then tune the optical cavity mode to its energy via in-situ lithography. In addition, we design an asymmetric tunneling barrier to allow the optical trapping of the charge, assisted by a quasi-resonant pumping scheme, in order to control its occupation probability. We evaluate the generation of a positively-charged quantum dot through second order auto-correlation measurements of its resonance fluorescence, and the quality of light-matter interaction for these spin-photon interfaces is assessed by measuring the performance of the device as a single-photon source.

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P. Hilaire, C. Millet, J. C. Loredo, C. Antón, A. Harouri, A. Lemaître, I. Sagnes, N. Somaschi O. Krebs, P. Senellart, L. Lanco. 2019-09-05. Deterministic assembly of a charged quantum dot-micropillar cavity device. https://doi.org/10.1103/physrevb.102.195402

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