Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals: From Sources to Application

Tau Bernstorff Lehmann

Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals: From Sources to Application

Tau Bernstorff Lehmann

Abstract

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

Forlag	The Niels Bohr Institute, Faculty of Science, University of Copenhagen
Antal sider	114
Status	Udgivet - 2016

Adgang til dokumentet

PHD-Tau Bernstorff LehmannForlagets udgivne version, 13 MB

http://rex.kb.dk/KGL:KGL:KGL01009242232

Andre filer og links

Sign in to request a library copy

Citationsformater

@phdthesis{772d4fcaffae4ad6b9bbda6fd16b1c26,

title = "Single-Photon Technologies Based on Quantum-Dots in Photonic Crystals: From Sources to Application",

abstract = "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.",

author = "Lehmann, {Tau Bernstorff}",

year = "2016",

language = "English",

publisher = "The Niels Bohr Institute, Faculty of Science, University of Copenhagen",

}

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 - http://rex.kb.dk/KGL:KGL:KGL01009242232

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 -