On the Photoluminescence Properties of InGaAs/GaAs and GaAs/AlGaAs Quantum Well Structures PDF Download
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Author: Johannes Reinhardt Botha
Publisher:
ISBN:
Category :
Languages : en
Pages : 428
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Book Description
Author: Johannes Reinhardt Botha
Publisher:
ISBN:
Category :
Languages : en
Pages : 428
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Book Description
Author: Li Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 548
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Book Description
Author: P. K. Bhattacharya
Publisher: IET
ISBN: 9780852968819
Category : Electronic books
Languages : en
Pages : 238
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Book Description
A finely-structured, state-of-the-art review on controlled building of atomic-scale mutilayers, where nanometric structures based on III-V semiconductors have attracted particular attention.
Author: M O Manasreh
Publisher: CRC Press
ISBN: 9789056992644
Category : Technology & Engineering
Languages : en
Pages : 870
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Book Description
InP is a key semiconductor for the production of optoelectronic and photonic devices. Its related compounds, such as InGaAsP alloy, have been realized as very important materials for communication in the 1.3 and 1.55 micron spectral regions. Furthermore, the applications on InP and related compounds have extended to other areas that include laser diodes, light emitting diodes, photodetectors, waveguides, photocathodes, solar cells, and many other applications. The topics presented in this book have been chosen to achieve a balance between the properties of bulk materials, doping, characterization, applications, and devices. This unique volume, featuring chapters written by experts in the field, provides a good starting point for those who are new to the subject and contains detailed results and in depth discussions for those who are experts in the field.
Author: Christian A. Bartholomew
Publisher:
ISBN: 9781423528197
Category : Beryllium
Languages : en
Pages : 76
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Book Description
The continued development of state-of the-art semiconductor technologies and devices by the United States Air Force and the Department of Defense requires accurate and efficient techniques to evaluate and model these new materials. Of particular interest to the Air Force are quantum well structures which can be used for small-scale laser sources in fly-by-light applications, as efficient infrared countermeasures to heat-seeking missiles, or as advanced seekers in optically guided missiles. This thesis provides the initial experimental procedures and data necessary to begin producing accurate yet robust models. Although carrier effective masses could not be evaluated using hot-electron photoluminescence, photoluminescence excitation and temperature studies were conducted to determine the effects of strain and impurities on band structure in quantum structures. Beryllium-doped indium gallium arsenide (InGaAs:Be) quantum wells, compressively strained to lattice- match gallium arsenide, were studied, and parameters for strained energy gap, heavy hole-light hole split, and acceptor binding energy were evaluated. With the carrier effective masses fixed at accepted values, strain produced a 1.2715 eV energy gap within the well and a heavy hole-light hole split of 23.2meV. Finally, the beryllium binding energy was found to be 22.1 meV measured above the highest valence band (first quantized heavy hole band) at 300 K.
Author: Osamu Wada
Publisher: Springer Science & Business Media
ISBN: 1461526868
Category : Technology & Engineering
Languages : en
Pages : 464
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Book Description
As we approach the end of the present century, the elementary particles of light (photons) are seen to be competing increasingly with the elementary particles of charge (electrons/holes) in the task of transmitting and processing the insatiable amounts of infonnation needed by society. The massive enhancements in electronic signal processing that have taken place since the discovery of the transistor, elegantly demonstrate how we have learned to make use of the strong interactions that exist between assemblages of electrons and holes, disposed in suitably designed geometries, and replicated on an increasingly fine scale. On the other hand, photons interact extremely weakly amongst themselves and all-photonic active circuit elements, where photons control photons, are presently very difficult to realise, particularly in small volumes. Fortunately rapid developments in the design and understanding of semiconductor injection lasers coupled with newly recognized quantum phenomena, that arise when device dimensions become comparable with electronic wavelengths, have clearly demonstrated how efficient and fast the interaction between electrons and photons can be. This latter situation has therefore provided a strong incentive to devise and study monolithic integrated circuits which involve both electrons and photons in their operation. As chapter I notes, it is barely fifteen years ago since the first demonstration of simple optoelectronic integrated circuits were realised using m-V compound semiconductors; these combined either a laser/driver or photodetector/preamplifier combination.
Author: Ikegami
Publisher: CRC Press
ISBN: 9780750302500
Category : Technology & Engineering
Languages : en
Pages : 1002
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Book Description
Bringing together international experts from 16 countries, Gallium Arsenide and Related Compounds 1992 focuses on device applications for Gallium Arsenide and related compounds. A topic of importance discussed is the first GaAs supercomputer from Fujitsu. The book also explores carbon doping and device applications in laser diodes, light modulators, and amplifiers, emphasizing business opportunity in consumer applications such as personal communications and TV tuners. It includes an account of the use of scanning tunneling microscopies in GaAs and related compounds. This book is ideal for physicists, materials scientists, and electronics and electrical engineers involved in III-V compound research.
Author: Matthias Karow
Publisher:
ISBN:
Category : Molecular beam epitaxy
Languages : en
Pages : 74
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Book Description
Multiple quantum well (MQW) structures have been employed in a variety of solid state devices. The InGaAs/GaAs material system is of special interest for many optoelectronic applications. This study examines epitaxial growth and defect creation in InGaAs/GaAs MQWs at its initial stage. Correlations between physical properties, crystal perfection of epitaxial structures, and growth conditions under which desired properties are achieved appear as highly important for the realization and final performance of semiconductor based devices. Molecular beam epitaxy was utilized to grow InGaAs/GaAs MQW structures with a variation in deposition temperature Tdep among the samples to change crystalline and physical properties. High resolution x-ray diffraction and transmission electron microscopy were utilized to probe crystal properties, whereas photoluminescence spectroscopy evaluated optical response. An optimal growth temperature Tdep=505 & deg;C was found for 20% In composition. The density of 60 & deg; primary and secondary dislocation loops increased continuously at lower growth temperatures and reduced crystal perfection, as evaluated by lateral and vertical coherence lengths and diffuse scattering in reciprocal space maps. Likewise, the strength of non-radiative Shockley-Read-Hall recombination increased as deposition temperature was reduced. Elevated deposition temperature led to InGaAs decay in the structures and manifested in different crystalline defects with a rather isotropic distribution and no lateral ordering. High available thermal energy increased atomic surface diffusivity and resulted in growth surface instability against perturbations, manifesting in lateral layer thickness undulations. Carriers in structures grown at elevated temperature experience localization in local energy minima. InGaAs/GaAs MQW structures reveal correlation between their crystal quality and optical properties. It can be suggested that there is an optimal growth temperature range for each In composition with high crystal perfection and best physical response.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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Book Description
The authors have investigated the properties of GaAsSb/InGaAs type-II bilayer quantum well structures grown by molecule beam epitaxy for use in long-wavelength lasers on GaAs substrates. Structures with layer, strains and thicknesses designed to be thermodynamically stable against dislocation formation exhibit room-temperature photoluminescence at wavelengths as long as 1.43 [mu]m. The photoluminescence emission wavelength is significantly affected by growth temperature and the sequence of layer growth (InGaAs/GaAsSb vs GaAsSb/InGaAs), suggesting that Sb and/or In segregation results in non-ideal interfaces under certain growth conditions. At low injection currents, double heterostructure lasers with GaAsSb/InGaAs bilayer quantum well active regions display electroluminescence at wavelengths comparable to those obtained in photoluminescence, but at higher currents the electroluminescence shifts to shorter wavelengths. Lasers have been obtained with threshold current densities as low as 120 A/cm2 at 1.17 [mu]m, and 2.1 kA/cm2 at 1.21 [mu]m.
Author: Bekkay Hajji
Publisher: Springer Nature
ISBN: 9811562598
Category : Technology & Engineering
Languages : en
Pages : 858
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Book Description
This book includes papers presented at the Second International Conference on Electronic Engineering and Renewable Energy (ICEERE 2020), which focus on the application of artificial intelligence techniques, emerging technology and the Internet of things in electrical and renewable energy systems, including hybrid systems, micro-grids, networking, smart health applications, smart grid, mechatronics and electric vehicles. It particularly focuses on new renewable energy technologies for agricultural and rural areas to promote the development of the Euro-Mediterranean region. Given its scope, the book is of interest to graduate students, researchers and practicing engineers working in the fields of electronic engineering and renewable energy.
