Lifetimes and Quantum Efficiencies of Quantum Dots Deterministically Positioned in Photonic-Crystal Waveguides
X.-L. Chu1, T. Pregnolato1,a, R. Schott2, A.D. Wieck3, A. Ludwig3, N. Rotenberg1, and P. Lodahl1
Published in:
Adv. Quantum Technol., vol. 3, no. 11, pp. 2000026 (2020).
Abstract:
Interfacing single emitters and photonic nanostructures enables modifying their emission properties, such as enhancing individual decay rates or controlling the emission direction. To achieve full control, the single emitter must be positioned in the nanostructures deterministically. Here, spectroscopy is used to gain spectral and spatial information about individual quantum dots (QD) in order to position each emitter in a predetermined location in a unit cell of a photonic-crystal waveguide (PhCW). Depending on the spatial and spectral positioning within the structured nanophotonic mode, the quantum dot emission is observed to either be suppressed or enhanced. These results represent an important step towards unlocking the full potential of nanophotonic systems and will be crucial to the creation of complex multi-emitter quantum photonic circuits.
1 Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, Copenhagen DK-2100, Denmark
2 Laboratorium für Festkörperphysik, ETH Zürich, Otto-Stern-Weg 1, Zürich 8093, Switzerland
3 Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany
a Present address: Department of Integrated Quantum Technology, Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
Keywords:
nanofabrication, quantum dots, quantum nanophotonics, single-photon sources
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