Exciton Photon And Phonon Interactions In Semiconductor Quantum Dots
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Exciton Photon And Phonon Interactions In Semiconductor Quantum Dots
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Author : Kaijie Xu
language : en
Publisher:
Release Date : 2012
Exciton Photon And Phonon Interactions In Semiconductor Quantum Dots written by Kaijie Xu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Electronic dissertations categories.
Semiconductor Quantum Dots
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Author : Y. Masumoto
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17
Semiconductor Quantum Dots written by Y. Masumoto and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Technology & Engineering categories.
Semiconductor quantum dots represent one of the fields of solid state physics that have experienced the greatest progress in the last decade. Recent years have witnessed the discovery of many striking new aspects of the optical response and electronic transport phenomena. This book surveys this progress in the physics, optical spectroscopy and application-oriented research of semiconductor quantum dots. It focuses especially on excitons, multi-excitons, their dynamical relaxation behaviour and their interactions with the surroundings of a semiconductor quantum dot. Recent developments in fabrication techniques are reviewed and potential applications discussed. This book will serve not only as an introductory textbook for graduate students but also as a concise guide for active researchers.
Electron And Photon Confinement In Semiconductor Nanostructures
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Author : Benoît Deveaud
language : en
Publisher: IOS Press
Release Date : 2003
Electron And Photon Confinement In Semiconductor Nanostructures written by Benoît Deveaud and has been published by IOS Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Science categories.
The purpose of this course was to give an overview of the physics of artificial semiconductor structures confining electrons and photons. It furnishes the background for several applications in particular in the domain of optical devices, lasers, light emitting diodes or photonic crystals. The effects related to the microactivity polaritons, which are mixed electromagnetic radiation-exciton states inside a semiconconductor microactivity are covered. The study of the characteristics of such states shows strong relations with the domain of cavity quantum electrodynamics and thus with the investigation of some fundamental theoretical concepts.
On The Interactions Between Charges Phonons And Photons In Electric Field Tunable Quantum Dot Molecules
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Author :
language : en
Publisher:
Release Date : 2001
On The Interactions Between Charges Phonons And Photons In Electric Field Tunable Quantum Dot Molecules written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
This dissertation focuses on the optical properties of single InAs/GaAs quantum dot molecules. A quantum dot molecule consists of a pair of quantum dots coupled by a nanometer scale tunneling barrier. Compared to single quantum dots, quantum dot molecules provide greatly enhanced versatility - with the ease of an electric field control, one gains broad flexibility to tune electronic energy levels and manipulate particle tunneling within a QDM. As a consequence, individual QDMs are being intensely studied as controllable interfaces of charge, spin and photonic quantum states at the single particle level. On the other hand, phonons - the quantized vibrations of the underlying crystal lattice - have mostly been left outside the realm of coherent control. In the domain of solid-state quantum technologies, the ubiquitous phonons are mainly considered for the limitations they impose. Omnipresent electron-phonon interactions and the predominantly dissipative nature of phonons are typically a major source of decoherence of the atom-like quantum states hosted by low-dimensional solid-state structures, such as QDMs. Here, we report experimental and theoretical results on the interactions between charges, photons and phonons in electric field tunable quantum dot molecules. Using an effective mass perturbation model, we compute the low energy biexciton states of a quantum dot molecule and apply them to provide a theoretical description of the dipole-dipole interaction between two excitons occupying separate dots in a quantum dot molecule. The expected properties of these so called dipolar states are presented, and we highlight their potential application as a switch for manipulating the transition energy and tunneling properties of the ground state neutral exciton. We then present results from a comprehensive investigation of the quantum confined Stark effect in quantum dot molecules, in which we studied the electric-field dependent energy shifts of exciton states as a function of the tunneling barrier width. Our experimental and computational results reveal that molecular wavefunction formation in quantum dot molecules strongly affects the quantum confined Stark effect, even as the dots are tuned far from resonance for particle tunneling. This dissertation culminates with our report of a novel mechanism by which phonons are made non-dissipative and coherent via electric field control and the optically driven formation of a molecular polaron in a quantum dot molecule. The coherent interaction of a single optical phonon with individual electronic states is revealed via a Fano-type quantum interference that produces a phonon-induced transparency in the optical absorption of individual quantum dot molecules. Experimentally, we find that the transparency is widely tunable by electronic and optical means, and provides a mechanism for amplifying weak coupling channels. This work is significant in that it demonstrates a specific mechanism by which typically incoherent and dissipative phonons are made to behave in a coherent and non-dissipative manner. As such, we demonstrate that phonons may enter the realm of mutual control of quantum states on the single particle level, which so far has been dominated by photons, electrons and spins.
Quantum Dots For Quantum Information Technologies
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Author : Peter Michler
language : en
Publisher: Springer
Release Date : 2017-06-01
Quantum Dots For Quantum Information Technologies written by Peter Michler and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-01 with Science categories.
This book highlights the most recent developments in quantum dot spin physics and the generation of deterministic superior non-classical light states with quantum dots. In particular, it addresses single quantum dot spin manipulation, spin-photon entanglement and the generation of single-photon and entangled photon pair states with nearly ideal properties. The role of semiconductor microcavities, nanophotonic interfaces as well as quantum photonic integrated circuits is emphasized. The latest theoretical and experimental studies of phonon-dressed light matter interaction, single-dot lasing and resonance fluorescence in QD cavity systems are also provided. The book is written by the leading experts in the field.
Vibrational Properties And Exciton Phonon Interactions In Lead Sulfide Nanocrystals
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Author : Todd Douglas Krauss
language : en
Publisher:
Release Date : 1998
Vibrational Properties And Exciton Phonon Interactions In Lead Sulfide Nanocrystals written by Todd Douglas Krauss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Electron-phonon interactions categories.
Single Quantum Dots
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Author : Peter Michler
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-12-09
Single Quantum Dots written by Peter Michler and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-12-09 with Science categories.
Special focus is given to the optical and electronic properties of single quantum dots due to their potential applications in devices operating with single electrons and/or single photons. This includes quantum dots in electric and magnetic fields, cavity-quantum electrodynamics, nonclassical light generation, and coherent optical control of excitons.
Colloidal Quantum Dot Optoelectronics And Photovoltaics
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Author : Gerasimos Konstantatos
language : en
Publisher: Cambridge University Press
Release Date : 2013-11-07
Colloidal Quantum Dot Optoelectronics And Photovoltaics written by Gerasimos Konstantatos and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-07 with Science categories.
Captures the most up-to-date research in the field, written in an accessible style by the world's leading experts.
Tailored Electron Phonon Interactions In Semiconductor Double Quantum Dots
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Author : Thomas Richard Hartke
language : en
Publisher:
Release Date : 2017
Tailored Electron Phonon Interactions In Semiconductor Double Quantum Dots written by Thomas Richard Hartke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
This thesis demonstrates the construction of a double quantum dot (DQD) in an Indium Arsenide (InAs) nanowire that is mechanically suspended in vacuum between metal contacts and capacitively coupled to a superconducting microwave resonator. This mechanical suspension scheme places the DQD at the center of an effective 380 nm long phonon cavity created by the contacts supporting the ends of the suspended nanowire. Because electron-phonon coupling mechanisms lead to electron transport through the DQD, measurements of current can be used as a probe of the phonon density of states in the nanostructure. Current measurements reveal strong signatures of electron-phonon coupling at energies corresponding to the guitar string vibrational modes of the suspended nanowire. In addition, photon emission has recently been observed in InAs nanowire DQDs coupled to superconducting cavities. However, it has been proposed that a phonon must simultaneously be emitted with each photon to ensure energy conservation. Therefore the photon emission rate should be enhanced when the emitted phonons couple strongly to electrons in the DQD. We quantitatively confirm this hypothesis by independently measuring both the photon emission into the cavity and the electron-phonon coupling strength as a function of the DQD energy splitting.
Semiconductor Quantum Dots
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Author : Ladislaus Alexander Banyai
language : en
Publisher: World Scientific
Release Date : 1993-05-28
Semiconductor Quantum Dots written by Ladislaus Alexander Banyai and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-05-28 with Science categories.
Semiconductor Quantum Dots presents an overview of the background and recent developments in the rapidly growing field of ultrasmall semiconductor microcrystallites, in which the carrier confinement is sufficiently strong to allow only quantized states of the electrons and holes. The main emphasis of this book is the theoretical analysis of the confinement induced modifications of the optical and electronic properties of quantum dots in comparison with extended materials. The book develops the theoretical background material for the analysis of carrier quantum-confinement effects, introduces the different confinement regimes for relative or center-of-mass motion quantization of the electron-hole-pairs, and gives an overview of the best approximation schemes for each regime. A detailed discussion of the carrier states in quantum dots is presented and surface polarization instabilities are analyzed, leading to the self-trapping of carriers near the surface of the dots. The influence of spin-orbit coupling on the quantum-confined carrier states is discussed. The linear and nonlinear optical properties of small and large quantum dots are studied in detail and the influence of the quantum-dot size distribution in many realistic samples is outlined. Phonons in quantum dots as well as the influence of external electric or magnetic fields are also discussed. Last but not least the recent developments dealing with regular systems of quantum dots are also reviewed. All things included, this is an important piece of work on semiconductor quantum dots not to be dismissed by serious researchers and physicists.