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Main Title: Generation of maximally entangled states and coherent control in quantum dot microlenses
Author(s): Bounouar, Samir
Haye, Christpoh de la
Strauß, Max
Schnauber, Peter
Thoma, Alexander
Gschrey, Manuel
Schulze, Jan-Hindrik
Strittmatter, André
Rodt, Sven
Reitzenstein, Stephan
Type: Article
Language Code: en
Abstract: The integration of entangled photon emitters in nanophotonic structures designed for the broadband enhancement of photon extraction is a major challenge for quantum information technologies. We study the potential of quantum dot (QD) microlenses as efficient emitters of maximally entangled photons. For this purpose, we perform quantum tomography measurements on InGaAs QDs integrated deterministically into microlenses. Even though the studied QDs show non-zero excitonic fine-structure splitting (FSS), polarization entanglement can be prepared with a fidelity close to unity. The quality of the measured entanglement is only dependent on the temporal resolution of the applied single-photon detectors compared to the period of the excitonic phase precession imposed by the FSS. Interestingly, entanglement is kept along the full excitonic wave-packet and is not affected by decoherence. Furthermore, coherent control of the upper biexcitonic state is demonstrated.
Issue Date: 12-Apr-2018
Date Available: 17-Feb-2020
DDC Class: 530 Physik
Subject(s): biexcitons
integrated optics
light polarisation
quantum entanglement
quantum optics
semiconductor quantum dots
Sponsor/Funder: DFG, SFB 787, Halbleiter - Nanophotonik: Materialien, Modelle, Bauelemente
BMBF, 03V0630TIB, Entwicklung einer Halbleiterbasierten Einzelphotonenquelle für die Quanteninformationstechnologie
Journal Title: Applied Physics Letters
Publisher: American Institute of Physics (AIP)
Publisher Place: Melville, NY
Volume: 112
Issue: 15
Article Number: 153107
Publisher DOI: 10.1063/1.5020242
EISSN: 1077-3118
ISSN: 0003-6951
Notes: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 112, 153107 (2018) and may be found at
Appears in Collections:AG Optoelektronik und Quantenbauelemente » Publications

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