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Temperature Dependent Exciton Dynamics In Quantum Wells
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Book Synopsis Temperature-Dependent Exciton Dynamics in Quantum Wells by : S. D. Baranovskii
Download or read book Temperature-Dependent Exciton Dynamics in Quantum Wells written by S. D. Baranovskii and published by . This book was released on 1999 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the relation between expenmental results and theoretical models suggested so far for the temperature-dependent energy relaxation and recombination of excitons in coupled QWs. Physical conditions are discussed that favour each class of theoretical models.
Book Synopsis Exciton Dynamics in Semiconductor Quantum Dot Structures by : Matthias Schwab
Download or read book Exciton Dynamics in Semiconductor Quantum Dot Structures written by Matthias Schwab and published by . This book was released on 2005 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature Dependence of Exciton and Trion Photoluminescence in CdTe/CdZnTe Quantum Wells by : Eric M. Behling
Download or read book Temperature Dependence of Exciton and Trion Photoluminescence in CdTe/CdZnTe Quantum Wells written by Eric M. Behling and published by . This book was released on 1996 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exciton Dynamics in GaAs Quantum Wells by : Vivek Srinivas
Download or read book Exciton Dynamics in GaAs Quantum Wells written by Vivek Srinivas and published by . This book was released on 1992 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exciton Dynamics in CdZnTe/ZnTe Quantum Wells by : John P. Doran
Download or read book Exciton Dynamics in CdZnTe/ZnTe Quantum Wells written by John P. Doran and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics of Excitons in Quantum Wells by : M. Zachau
Download or read book Dynamics of Excitons in Quantum Wells written by M. Zachau and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We measure the time dependence of the excitonic photoluminescence (PL) in quantum wells (QWs) with well width Lz ranging from 25A to 50A. The samples are AI0.2Ga0.8As/GaAs multiple QWs with 30 periods with decoupled wells and were grown by molecular beam epitaxy (MBE). QWs grown with and without growth interruption at the interfaces are investigated. The excitation is provided by 5 psec pulses from a synchronously pumped tunable dye laser. The PL spectrum is detected by an imaging (i.e. multichannel) photomultiplier with a spectral resolution of 0.5 meV and time resolution (FWHM) of 120 psec.
Book Synopsis Exciton Dynamics in AlGaAs/GaAs Quantum Wells and in Focused Ion Beam Patterned Quantum Well Wire-like Structures by : Xuelong Cao
Download or read book Exciton Dynamics in AlGaAs/GaAs Quantum Wells and in Focused Ion Beam Patterned Quantum Well Wire-like Structures written by Xuelong Cao and published by . This book was released on 1995 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strong Light-matter Coupling in Microcavity-embedded Semiconductor Quantum Wells and Quantum Dots by : Kanchana Sivalertporn
Download or read book Strong Light-matter Coupling in Microcavity-embedded Semiconductor Quantum Wells and Quantum Dots written by Kanchana Sivalertporn and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a theoretical investigation of exciton polaritons in strongly-coupled exciton-photon microcavity systems. Two different systems, a coupled quantum well (CQW) embedded in a planar microcavity and a quantum dot (QD) inside a micropillar cavity, are studied using suitable theoretical models. The exciton-polariton states are calculated and their optical properties are investigated in detail, showing a good agreement with experimental observations. For a CQW structure, the excitonic states in the presence of the electric field applied in the growth direction are calculated by solving the Schrodinger equation in real space. The field dependence of exciton transition energy, binding energy, oscillator strength, lifetime and absorption is studied. The exciton ground state experiences a crossover from direct to indirect state at low electric field. A single state-basis calculation in which only the electron and hole ground states are taken into account is also made and compared with the full accurate calculation model. The polariton effect in a microcavity-embedded CQW is investigated based on the semiclassical theory. The light-matter interaction is treated by solving coupled material and Maxwell's equations. The reflectivity and absorption spectra are calculated for different detunings using the scattering matrix method. When a cavity mode is tuned to an exciton mode (zero detuning), an anticrossing of two polariton modes is observed, showing that the system is in the strong coupling regime. In addition, the fractions of direct exciton, indirect exciton and cavity modes contributed to the polariton states are calculated using the microscopic theory. The resulting polariton state with comparable contributions ofall three components called dipolariton is observed. Finally, the dynamics of the strongly-coupled exciton-cavity system in the QD-micropillar system is studied using the four wave mixing (FWM) theory applied to the Jaynes-Cummings model. Spectrally resolved and time-resolved FWM signals are calculated for different temperatures. Temperature plays the role of the parameter controlling the detuning. The beat periods of the first and second rungs of the JC ladder are also investigated, showing that the second rung has a sqaure- shorter period compared to the beat period of the first rung. To reveal the coherent coupling between two distant QDs, the FWM signals are Fourier-transformed into a two-dimensional frequency domain. It is found that the off-diagonal components in these 2D spectra are nonzero, demonstrating the coherent coupling between isolated QDs. In addition, the phase correction is developed. This procedure is neccessary for a comparison with the experiment which has random phases for different detunings. A quantitative agreement between the prediction and measurement is achieved and demonstrated.
Book Synopsis Exciton Formation Dynamics in Semiconductor Quantum Wells (PHD). by : Sangam Chatterjee
Download or read book Exciton Formation Dynamics in Semiconductor Quantum Wells (PHD). written by Sangam Chatterjee and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrafast Density-and-temperature-dependent Carrier Dynamics in a Quantum Dots-in-a-well Heterostructure by :
Download or read book Ultrafast Density-and-temperature-dependent Carrier Dynamics in a Quantum Dots-in-a-well Heterostructure written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exciton Spin Dynamics in Quantum Wells by : Treena Grevatt
Download or read book Exciton Spin Dynamics in Quantum Wells written by Treena Grevatt and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Excitonic Processes In Condensed Matter, Proceedings Of 2000 International Conference (Excon2000) by : Kikuo Cho
Download or read book Excitonic Processes In Condensed Matter, Proceedings Of 2000 International Conference (Excon2000) written by Kikuo Cho and published by World Scientific. This book was released on 2001-08-22 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: At Yamada Conference LIII, papers on many novel materials and on novel phenomena in condensed matter physics were presented — for instance, the achievement of simultaneous creation of excitons and free-electron-hole pairs in rare gas solids, and a low frequency fluctuation of the spectral shift of indirect excitons in GaAs coupled quantum wells. Single molecule spectroscopy is a powerful tool for studying molecules including biological systems; the study of delocalization of excitons in the photosynthetic light harvesting antenna system was also reported. The proceedings thus contain many excellent papers dealing with current research topics on the excitonic processes in bulk, quantum wells, quantum dots and other confined systems. This book will serve as an excellent source of recent references and reviews for a wide range of researchers in physics, chemistry, engineering and biological sciences.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)
Book Synopsis Exciton Transport and Thermodynamics in Gallium Arsenide Quantum Wells by : Howard Wuk Yoon
Download or read book Exciton Transport and Thermodynamics in Gallium Arsenide Quantum Wells written by Howard Wuk Yoon and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the use of optical absorption and photoluminescence spectroscopy in understanding the spatial transport and energy relaxation of excitons in quantum well systems. I discuss the mechanism of carrier-induced changes in the absorption spectrum of a 210A GaAs multiple quantum well, and show that at moderate densities, the enhanced transmission at the heavy-hole exciton energy is due to collision broadening. I also discuss the time dependent and excitation-energy dependent energy shifts of the heavy-hole exciton. I use the changes induced in the absorption spectra due to the presence of carriers as a probe for measuring the spatial transport, and I describe the transport using an ionized-impurity scattering model. I also measure the carrier temperatures from the high energy slopes of the time-resolved photoluminescence spectra, and describe the roles of the carrier temperatures and carrier expansion on the time dynamics of the exciton luminescence intensity. In the last chapter, I study the transport properties of excitons in an asymmetric-coupled quantum well system, and explain the experimental results with a model based on interface-roughness scattering.
Book Synopsis Theory of Spin-dependent Optical Properties of Semiconductor Quantum Wells by : Marcelo Zoéga Maialle
Download or read book Theory of Spin-dependent Optical Properties of Semiconductor Quantum Wells written by Marcelo Zoéga Maialle and published by . This book was released on 1994 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Picosecond Dynamics of Neutral and Charged Excitons in Semiconductor Quantum Wells by : Victoria Ciulin
Download or read book Picosecond Dynamics of Neutral and Charged Excitons in Semiconductor Quantum Wells written by Victoria Ciulin and published by . This book was released on 2001 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Formation and Recombination Dynamics of Excitons and Trions in High Mobility Remotely Doped Quantum Wells by : Daniele Sanvitto
Download or read book Formation and Recombination Dynamics of Excitons and Trions in High Mobility Remotely Doped Quantum Wells written by Daniele Sanvitto and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrafast Dynamics of Magnetically Confined Excitons in GaAs Quantum Wells by : J. B. Stark
Download or read book Ultrafast Dynamics of Magnetically Confined Excitons in GaAs Quantum Wells written by J. B. Stark and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial confinement along one dimension, using the methods of epitaxial crystal growth, has demonstrated that linear and nonlinear optical properties depend strongly on dimensionality. Confinement along the remaining directions, however, continues to present formidable technological obstacles. Difficulties in the control of the surface properties and size distribution of quantum dots and semiconductor microcrystallites results in materials with unsatisfactory optical quality. Confinement along all three dimensions can be achieved, in materials of excellent optical quality, by placing a quantum well material in a perpendicular magnetic field. As the field is increased, the extension of the resulting electronic orbitals decreases, so that the dimensionality of the states may be tuned from two to zero dimensions. Using femtosecond excite-and-probe optical techniques in fields as large as 12 Tesla, we measure the time resolved dynamics of zero dimensional magneto-excitons.
