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Application Of Ultrafast Spectroscopy To The Study Of Size Controlled Self Assembled Ingaas Gaas Quantum Dots
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Book Synopsis Application of Ultrafast Spectroscopy to the Study of Size-controlled, Self-assembled In(Ga)As/GaAs Quantum Dots by : Lin Zhang
Download or read book Application of Ultrafast Spectroscopy to the Study of Size-controlled, Self-assembled In(Ga)As/GaAs Quantum Dots written by Lin Zhang and published by . This book was released on 2001 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-Assembled InGaAs/GaAs Quantum Dots by :
Download or read book Self-Assembled InGaAs/GaAs Quantum Dots written by and published by Academic Press. This book was released on 1999-03-29 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is concerned with the crystal growth, optical properties, and optical device application of the self-formed quantum dot, which is one of the major current subjects in the semiconductor research field.The atom-like density of states in quantum dots is expected to drastically improve semiconductor laser performance, and to develop new optical devices. However, since the first theoretical prediction for its great possibilities was presented in 1982, due to the difficulty of their fabrication process. Recently, the advent of self-organized quantum dots has made it possible to apply the results in important optical devices, and further progress is expected in the near future.The authors, working for Fujitsu Laboratories, are leading this quantum-dot research field. In this volume, they describe the state of the art in the entire field, with particular emphasis on practical applications.
Book Synopsis Self-Assembled InGaAs/GaAs Quantum Dots by :
Download or read book Self-Assembled InGaAs/GaAs Quantum Dots written by and published by Academic Press. This book was released on 1999-04-05 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is concerned with the crystal growth, optical properties, and optical device application of the self-formed quantum dot, which is one of the major current subjects in the semiconductor research field. The atom-like density of states in quantum dots is expected to drastically improve semiconductor laser performance, and to develop new optical devices. However, since the first theoretical prediction for its great possibilities was presented in 1982, due to the difficulty of their fabrication process. Recently, the advent of self-organized quantum dots has made it possible to apply the results in important optical devices, and further progress is expected in the near future. The authors, working for Fujitsu Laboratories, are leading this quantum-dot research field. In this volume, they describe the state of the art in the entire field, with particular emphasis on practical applications.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self-assembled Quantum Dots in Advanced Structures by : Megan Elizabeth Creasey
Download or read book Self-assembled Quantum Dots in Advanced Structures written by Megan Elizabeth Creasey and published by . This book was released on 2012 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in nanofabrication have bolstered the development of new optical devices with potential uses ranging from conventional optoelectronics, such as lasers and solar cells, to novel devices, like single photon or entangled photon sources. Quantum encryption of optical communications, in particular, requires devices that couple efficiently to an optical fiber and emit, on demand, indistinguishable photons. With these goals in mind, ultrafast spectroscopy is used to study the electron dynamics in epitaxially grown InAs/GaAs quantum dots (QDs). Quantifying the behavior of these systems is critical to the development of more efficient devices. Studies of two newly developed InGaAs QD structures, quantum dot clusters (QDCs) and QDs embedded in photonic wires, are presented herein. GaAs photonic wires with diameters in the range of 200 to 250 nm support only the fundamental HE11 guided mode. To fully quantify these new systems, the emission dynamics of QDs contained within wires in a large range of diameters are studied. Time correlated single photon counting measurements of the ground state exciton lifetimes are in very good agreement with predicted theoretical values for the spontaneous emission rates. For diameters smaller than 200 nm, QD emission into the HE11 mode is strongly inhibited and non-radiative processes dominate the decay rate. The best small diameter wires exhibit inhibition factors as high as 16, on par with the current state of the art for photonic crystals. The QDCs are the product of a hybrid growth technique that combines droplet heteroepitaxy with standard Stranski-Krastanov growth to create many different geometries of QDs. The work presented in this dissertation concentrates specifically on hexa-QDCs consisting of six InAs QDs around a GaAs nanomound. The first ever spectral and temporal properties of QDs within individual hexa-QDCs are presented. The QDs exhibit narrow exciton resonances with good temperature stability, indicating that excitons are well confined within individual QDs. A distinct biexponential decay is observed even at the single QD level. This behavior suggests that non-radiative decay mechanisms and exciton occupation of dark states play a significant role in the recombination dynamics in the QDCs.
Book Synopsis Ultrafast Carrier Dynamics of InGaAs Quantum Dots in the High Carrier Density Regime by : Kyoungsik Kim
Download or read book Ultrafast Carrier Dynamics of InGaAs Quantum Dots in the High Carrier Density Regime written by Kyoungsik Kim and published by . This book was released on 2004 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrafast Electronic Dynamics in Unipolar N-doped InGaAs/GaAs Self-Assembled Quantum Dots by : Zong-Kwei J. Wu
Download or read book Ultrafast Electronic Dynamics in Unipolar N-doped InGaAs/GaAs Self-Assembled Quantum Dots written by Zong-Kwei J. Wu and published by . This book was released on 2006 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: We presented a comprehensive picture of electron dynamics in the unipolar quantum dot structure. Although the phonon bottleneck is circumvented with high doped electron density, relaxation processes in unipolar quantum dots have been measured with time scales longer than that of bipolar systems. The results explain the operation principles of the quantum dot infrared photodetector on a microscopic level and provide basic understanding for future applications and designs.
Book Synopsis Optical Spectroscopy of Single Self-assembled InGaAs/GaAs Quantum Dots by : Ruth Oulton
Download or read book Optical Spectroscopy of Single Self-assembled InGaAs/GaAs Quantum Dots written by Ruth Oulton and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optical Spectroscopy of InGaAs GaAs Self Assembled Quantum Dots by : Paul William Fry
Download or read book Optical Spectroscopy of InGaAs GaAs Self Assembled Quantum Dots written by Paul William Fry and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Quantum Confined Energy Levels in Self-organized In(Ga,Al)As/(Ga,Al)As Quantum Dots and Their Application to Mid-infrared Sources and Detections by : Sanjay Krishna
Download or read book Study of Quantum Confined Energy Levels in Self-organized In(Ga,Al)As/(Ga,Al)As Quantum Dots and Their Application to Mid-infrared Sources and Detections written by Sanjay Krishna and published by . This book was released on 2001 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dekker Encyclopedia of Nanoscience and Nanotechnology by : James A. Schwarz
Download or read book Dekker Encyclopedia of Nanoscience and Nanotechnology written by James A. Schwarz and published by CRC Press. This book was released on 2004 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Theoretical Study of Structural Disorder and Photoluminescence Linewidth in InGaAs/GaAs Self Assembled Quantum Dots by : Yih-Yin Lin
Download or read book A Theoretical Study of Structural Disorder and Photoluminescence Linewidth in InGaAs/GaAs Self Assembled Quantum Dots written by Yih-Yin Lin and published by . This book was released on 2002 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past few years have seen considerable efforts in growth and device application of self- assembled quantum dots. However, the photoluminescence (PL) linewidth, which represents structural fluctuations in dot sizes, is still in the range of 30-50 meV. This large linewidth has deleterious effects on devices such as lasers based on self-assembled dots. In this paper we will examine the configuration-energy diagram of self-assembled dots. Our formalism is based on: (1) an atomistic Monte Carlo method which allows us to find the minimum energy configuration and strain tensors as well as intermediate configurations of dots; and (2) an 8 bands k-p method to calculate the electronic spectra. We present results on the strain energy per unit cell for various distributions of InAs/GaAs quantum dots and relate them to published experimental results. In particular we examine uncovered InAs/GaAs dots and show that in the uncovered state a well-defined minimum exists in the configuration energy plot. The minimum corresponds to the size that agrees well with experiments.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural, Optical and Spectral Behaviour of InAs-based Quantum Dot Heterostructures by : Saumya Sengupta
Download or read book Structural, Optical and Spectral Behaviour of InAs-based Quantum Dot Heterostructures written by Saumya Sengupta and published by Springer. This book was released on 2017-08-04 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the effects of growth pause or ripening time on the properties of quantum dots(QDs). It covers the effects of post-growth rapid thermal annealing (RTA) treatment on properties of single layer QDs. The effects of post-growth rapid thermal annealing (RTA) treatment on properties of single layer QDs are discussed. The book offers insight into InAs/GaAs bilayer QD heterostructures with very thin spacer layers and discusses minimum spacer thickness required to grow electronically coupled bilayer QD heterostructures. These techniques make bilayer QD heterostructures a better choice over the single layer and uncoupled multilayer QD heterostructure. Finally, the book discusses sub-monolayer (SML) growth technique to grow QDs. This recent technique has been proven to improve the device performance significantly. The contents of this monograph will prove useful to researchers and professionals alike.
Book Synopsis Growth of In(Ga)As/GaAs Self-organized Quantum Dots and Their Application to High-speed Lasers and Spin-polarized Light Sources by : Siddhārtha Ghosha
Download or read book Growth of In(Ga)As/GaAs Self-organized Quantum Dots and Their Application to High-speed Lasers and Spin-polarized Light Sources written by Siddhārtha Ghosha and published by . This book was released on 2003 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantum Dots for Quantum Information Technologies by : Peter Michler
Download or read book Quantum Dots for Quantum Information Technologies written by Peter Michler and published by Springer. This book was released on 2017-06-01 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Self-assembled In(Al,Ga)As/Ga(Al)As Quantum Dots for Intersubband Detectors by : Jamie Dean Phillips
Download or read book Self-assembled In(Al,Ga)As/Ga(Al)As Quantum Dots for Intersubband Detectors written by Jamie Dean Phillips and published by . This book was released on 1998 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
