Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals: From Sources to Application
Publikation: Bog/antologi/afhandling/rapport › Ph.d.-afhandling › Forskning
Standard
Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals : From Sources to Application. / Lehmann, Tau Bernstorff.
The Niels Bohr Institute, Faculty of Science, University of Copenhagen, 2016. 114 s.Publikation: Bog/antologi/afhandling/rapport › Ph.d.-afhandling › Forskning
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - BOOK
T1 - Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals
T2 - From Sources to Application
AU - Lehmann, Tau Bernstorff
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
UR - https://soeg.kb.dk/permalink/45KBDK_KGL/fbp0ps/alma99122260378205763
M3 - Ph.D. thesis
BT - Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals
PB - The Niels Bohr Institute, Faculty of Science, University of Copenhagen
ER -
ID: 164426260