Charged quantum dot micropillar system for deterministic light-matter interactions

Petros Androvitsaneas, Andrew Young, C. Schneider, S. Maier, M. Kamp, S. Hofling, Sebastian Knauer, Edmund Harbord, Chengyong Hu, J. Rarity, R. Oulton

Research output: Contribution to journalArticle (Academic Journal)peer-review

44 Citations (Scopus)
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Quantum dots (QDs) are semiconductor nanostructures in which a three dimensional potential trap produces an electronic quantum confinement, thus mimicking the behaviour of single atomic dipole-like transitions. However unlike atoms, QDs can be incorporated into solid state photonic devices such as cavities or waveguides that enhance the light-matter interaction. A near unit efficiency light-matter interaction is essential for deterministic, scalable quantum information (QI) devices. In this limit, a single photon input into the device will undergo a large rotation of the polarization of the light field due to the strong interaction with the QD. In this paper we measure a macroscopic (~ 6o) phase shift of light as a result of the interaction with a negatively charged QD coupled to a low quality-factor (Q~ 290) pillar microcavity. This unexpectedly large rotation angle demonstrates this simple low Q-factor design would enable near deterministic light-matter interactions.
Original languageEnglish
Article number241409(R)
Number of pages5
JournalPhysical Review B
Issue number24
Publication statusPublished - 21 Jun 2016

Structured keywords

  • QETLabs
  • Photonics and Quantum


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