Leiden University Scholarly Publications

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Bakker, M.P. (2015)

Cavity quantum electrodynamics with quantum dots in microcavities

Doctoral Thesis
Quantum dots (QDs) are nm-size semiconductor structures that hold promise for applications in quantum information. One important requirement, however, is to achieve near-unity interaction between photons and (singly charged) QDs. For this purpose, we make use of oxide-apertured micropillars that confine light in a small volume and thereby enhance the interaction. A QD transition coupled to the cavity mode can turn a transmittive cavity into a reflective one, and this property can be used to create entanglement between the spatial state of a photon and the spin state of a charge in the QD. This thesis consists of two parts: 1) in the first part we demonstrate techniques to monitor and fine tune the oxide aperture size and shape. By controlling the oxide shape we show we can fabricate polarization degenerate microcavities. 2) In the second part, perform cryogenic experiments with such a QD-cavity system. We investigate neutral and singly charged QDs as function of polarization and...Show moreQuantum dots (QDs) are nm-size semiconductor structures that hold promise for applications in quantum information. One important requirement, however, is to achieve near-unity interaction between photons and (singly charged) QDs. For this purpose, we make use of oxide-apertured micropillars that confine light in a small volume and thereby enhance the interaction. A QD transition coupled to the cavity mode can turn a transmittive cavity into a reflective one, and this property can be used to create entanglement between the spatial state of a photon and the spin state of a charge in the QD. This thesis consists of two parts: 1) in the first part we demonstrate techniques to monitor and fine tune the oxide aperture size and shape. By controlling the oxide shape we show we can fabricate polarization degenerate microcavities. 2) In the second part, perform cryogenic experiments with such a QD-cavity system. We investigate neutral and singly charged QDs as function of polarization and find this offers a way to assess the QD coherence. Next, we demonstrate a novel effect where charges around the QDs have a strong feedback with the QD properties. Finally, we present a homodyne detection technique of the QD coherence and phase shift.Show less
Cavity QED
Self-assembled quantum dots
Microcavities
Quantum optics
Micropillars
All authors
Bakker, M.P.
Supervisor
Bouwmeester, D.
Co-supervisor
Exter, M.P. van
Committee
Gerardot, B.F.; Fiore, A.; Blaauboer, M.; Orrit, M.A.J.G.; Eliel, E.R.; Dood, M.J.A. de
Qualification
Doctor (dr.)
Awarding Institution
Leiden Institute of Physics, Faculty of Science, Leiden University
Date
2015-06-17
Title of host publication
Casimir PhD Series
ISBN (print)
9789085932246

Publication Series

Name
2015-15

Funding

Sponsorship
This work is part of the research programme of the Foundation for Fundamental Research on Matter (FOM), which is part of the Netherlands Organisation for Scientific Research (NWO)