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رکورد قبلیرکورد بعدی

" Quantum confined excitons in 2-dimensional materials / "


Document Type : BL
Record Number : 859494
Main Entry : Palacios-Berraquero, Carmen
Title & Author : Quantum confined excitons in 2-dimensional materials /\ Carmen Palacios-Berraquero.
Publication Statement : Cham, Switzerland :: Springer,, 2018.
Series Statement : Springer theses,
Page. NO : 1 online resource (xii, 116 pages) :: illustrations (some color)
ISBN : 3030014827
: : 9783030014827
: 3030014819
: 9783030014810
Notes : "Doctoral thesis accepted by the University of Cambridge, Cambridge, UK."
Bibliographies/Indexes : Includes bibliographical references.
Contents : Intro; Supervisor's Foreword; Preface; Acknowledgements; Contents; 1 Introduction: 2d-Based Quantum Technologies; 1.1 Semiconducting Group-VI Transition Metal Dichalcogenides; 1.1.1 Excitons in 2d-TMDs; 1.1.2 Spin-Dark and Momentum-Dark Excitons; 1.1.3 Strain-Related Effects; 1.2 Van der Waals Materials and Heterostructures; 1.3 Quantum Information Technologies Using Single-Photons; 1.3.1 Single-Photons in 2d; 1.3.2 Characteristics of 2d-Based Quantum Emitting Sites; References; 2 Experimental Techniques; 2.1 Single-Photon Optics; 2.1.1 Confocal Microscopy; 2.1.2 Photon-Photon Correlation.
: 2.1.3 Tailored Spectral Filtering2.2 Processing of 2d Materials and Devices; 2.2.1 Fabrication of 2d-Heterostructures; 2.2.2 All-Dry Viscoelastic Transfer; References; 3 Deterministic Arrays of Single-Photon Sources; 3.1 Motivation: Scalable Quantum Technologies; 3.2 Results: Achieving Quantum Confinement; 3.2.1 Nanopillar-TMD Sample Fabrication; 3.2.2 Deterministic 1L-WSe2-QDs: Optical Measurements; 3.2.3 Deterministic 1L-WS2-QDs: Optical Measurements; 3.3 Discussion; 3.4 Impact; 3.5 Conclusions and Outlook; References; 4 Atomically-Thin Quantum Light Emitting Diodes.
: 4.1 Motivation: Electrically-Triggered Single Photons and Next-Generation Devices4.2 Results: Atomically Thin Quantum Light Emitting Diodes; 4.2.1 Design of a TMD-Based QLED Device; 4.2.2 Electrically Triggered Quantum Light in a WSe2-Based QLED; 4.2.3 All-Electrical Generation of Single-Photon Emission in WS2; 4.3 Discussion and Impact; 4.4 Conclusions and Outlook; References; 5 2d Quantum Light-Matter Interfaces; 5.1 Motivation: Hybrid Light-Matter Quantum Networks; 5.1.1 Charge-Trapping in InGaAs-QDs: Selection Rules and Devices; 5.1.2 TMD-Based Spin-Valley Qubits.
: 5.2 Results: Capturing Single-Charges in TMD-QDs5.2.1 Heterostructure Design and Fabrication; 5.2.2 Voltage-Dependent Photoluminescence Spectra; 5.2.3 Polarisation Conservation Effect in Charged Dots; 5.3 Discussion; 5.4 Conclusions and Outlook; References; 6 Conclusions and Outlook; References; Appendix Curriculum Vitae.
Abstract : This book presents the first established experimental results of an emergent field: 2-dimensional materials as platforms for quantum technologies, specifically through the optics of quantum-confined excitons. It also provides an extensive review of the literature from a number of disciplines that informed the research, and introduces the materials of focus - 2d Transition Metal Dichalcogenides (2d-TMDs) - in detail, discussing electronic and chemical structure, excitonic behaviour and response to strain. This is followed by a brief overview of quantum information technologies, including concepts such as single-photon sources and quantum networks. The methods chapter addresses quantum optics techniques and 2d-material processing, while the results section shows the development of a method to deterministically create quantum dots (QDs) in the 2d-TMDs, which can trap single-excitons; the fabrication of atomically thin quantum light-emitting diodes to induce all-electrical single-photon emission from the QDs, and lastly, the use of devices to controllably trap single-spins in the QDs -the first step towards their use as optically-addressable matter qubits.
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