Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals: From Sources to Application
Publikation: Bog/antologi/afhandling/rapport › Ph.d.-afhandling › Forskning
In this thesis, the application of semiconductor quantum-dots in photonic crystals is explored as aresource for single-photon technology.Two platforms based on photonic crystals, a cavity and a waveguide, are examined as platformssingle-photon sources. Both platforms demonstrate strong single-photon purity under quasi-resonantexcitation. Furthermore the waveguide based platform demonstrates indistinguishable single-photonsat timescales up to 13 ns.A setup for active demultiplexing of single-photons to a three-fold single-photon state is proposed.Using a fast electro-optical modulator, single-photons from a quantum-dot are routed on timescalesof the exciton lifetime. Using active demultiplexing a three-fold single-photon state is generated at anextracted rate of 2:03 ±0:49 Hz.An on-chip power divider integrated with a quantum-dot is investigated. Correlation measurementof the photon statistic veries the single-photon nature of the quantum-dot. Furthermore correlationmeasurement between the outputs of the power divider conrms the passive separation of the singlephotonemission.A scheme for post-emission entanglement generation between single-photons from an efficientsource is discussed. The possible applications of post-emission entanglement generation are presented.An experimental realization of the scheme are constructed and characterized using single-photons froman efficient source.
Originalsprog | Engelsk |
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Forlag | The Niels Bohr Institute, Faculty of Science, University of Copenhagen |
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Antal sider | 114 |
Status | Udgivet - 2016 |
ID: 164426260