Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Spectroscopy Of Gaas Quantum Wells full books in PDF, epub, and Kindle. Read online Spectroscopy Of Gaas Quantum Wells ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : Lawrence Camest West
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.F/5 ( download)
Download or read book Spectroscopy of GaAs Quantum Wells written by Lawrence Camest West and published by . This book was released on 1985 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spectroscopy of GaAs Quantum Wells written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new type of optical dipole transition in GaAs quantum wells has been observed. The dipole occurs between two envelope states of the conduction band electron wavefunction, and is called a quantum well envelope state transition (QWEST). The QWEST is observed by infrared absorption in three different samples with quantum well thicknesses 65, 82, and 92 A and resonant energies of 152, 121, and 108 MeV, respectively. The oscillator strength is found to have values of over 12, in good agreement with prediction. The linewidths are seen as narrow as 10 MeV at room temperature and 7 MeV at low temperature, thus proving a narrow line resonance can indeed occur between transitions of free electrons. Techniques for the proper growth of these quantum well samples to enable observation of the QWEST have also been found using (AlGa)As compounds. This QWEST is considered to be an ideal material for an all optical digital computer. The QWEST can be made frequency matched to the inexpensive Carbon Dioxide laser with an infrared wavelength of 10 microns. The nonlinearity and fast relaxation time of the QWEST indicate a logic element with a subpicosecond switch time can be built in the near future, with a power level which will eventually be limited only by the noise from a lack of quanta to above approximately 10 microwatts. 64 refs., 35 figs., 6 tabs.
Author : David James Lovering
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (599 download)
Download or read book Time Resolved Optical Spectroscopy of Electronic States in GaAs Quantum Wells written by David James Lovering and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S.J Adams
Publisher :
ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.:/5 (838 download)
Download or read book Optical Spectroscopy of In ̲xGa1- ̲xAs/GaAs Quantum Wells written by S.J Adams and published by . This book was released on 1992 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. D. Williams
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (316 download)
Download or read book Spectroscopy of Single Free Standing Quantum Wells written by M. D. Williams and published by . This book was released on 2006 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We investigated the interaction of quantum confined exciton states GaAs quantum wells with native surface states. Single molecule photoluminescence (PL) spectroscopy, developed by T. Huser at LLNL was used to probe the unique bare quantum wells in the free standing quantum well structure. The latter was developed by the M.D. Williams at Clark Atlanta University. The goals of the project during this budget cycle were to procure samples containing GaAs free standing QWs, identify suitable regions for PL analysis at Lawrence Livermore, analyze the structures at room temperature and at liquid nitrogen temperatures. The specific regions of interest on the sample structures were identified by scanning electron microscopy at Clark Atlanta prior to transport to LLNL. Previous attempts at other facilities using NSOM, cathodoluminescence, and conventional PL showed little luminescence activity at room temperature from the 200 {angstrom} thick wells. This suggested either excess recombination due to surface states in the quantum well region or insufficient absorption length for photoluminescence. The literature suggested that the effect of the defects could be eliminated by reducing the sample temperature below their associated activation energies. In our previous subcontract work with LLNL, a significant amount of effort was expended to modify the apparatus to allow low temperature measurements. The modifications were not successful and we concluded that in order to do the measurements at low temperature we would need to purchase a commercial optical cryostat to get reliable results. Ms. Rochelle Bryant worked during the summer as an intern at LLNL on the project under the supervision of C. Hollars and in collaboration with T. Huser and found that PL emission could be obtained at room temperature. This was a surprising result as the literature and our experience shows that there is no PL emission from GaAs at room temperature. We speculate that this is due to the small interaction region excited by the laser source. We proceeded with the project using this new found room temperature capability and have analyzed the effect of various chemical species on the PL emission from the GaAs QWs. We were able to observe some significant intensity modifications of the PL spectra with chemical adsorbants. This progress holds promise for the development of this structure as a chemical or biological sensor.
Author : I. A. Yugova
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (742 download)
Download or read book Spectroscopy of the High Energy Quantum Confined Excitonic States in the Thick GaAs Quantum Wells written by I. A. Yugova and published by . This book was released on 2000 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strong oscillations were observed in a wide spectral region in photo- and electro reflection spectra of heterostructures with the thick GaAs quantum wells. Different physical mechanisms of these oscillation are discussed. It is proved experimentally and theoretically that the observed phenomenon is due to the quantum size effect of the exciton in the GaAs quantum wells.
Author : Emmanuel Rosencher
Publisher : Springer Science & Business Media
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.X/5 (2 download)
Download or read book Intersubband Transitions in Quantum Wells written by Emmanuel Rosencher and published by Springer Science & Business Media. This book was released on 1992 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some 30 lectures consider phenomena associated with electrical charges passing through very thin (less than 15 nm) layers of semiconductor material. The optical nonlinearities that result have application in the electronic-devices industry, and provide a real-life example of theoretical one-dimensio"
Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (227 download)
Download or read book Room-Temperature Photocurrent Spectroscopy of GaAs/GaAlAs Multiple Quantum Wells written by and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: By means of room temperature photocurrent spectroscopy, we have studied the effect of electric fields on exciton absorption in GaAs/GaAlAs multiple quantum wells (MQW) and discuss in this paper the effect of an electric field on the photocurrent spectra for some kinds of MWQ structures. The material requirement for related optoelectric devices MQW is also discussed. (jg).
Author : Stephen J. A. Adams
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (534 download)
Download or read book Optical Spectroscopy of InxGa?b1?s-xAs/GaAs Quantum Wells written by Stephen J. A. Adams and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : B.R. Nag
Publisher : Springer Science & Business Media
ISBN 13 : 0306471272
Total Pages : 309 pages
Book Rating : 4.3/5 (64 download)
Download or read book Physics of Quantum Well Devices written by B.R. Nag and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum well devices have been the objects of intensive research during the last two decades. Some of the devices have matured into commercially useful products and form part of modern electronic circuits. Some others require further dev- opment, but have the promise of being useful commercially in the near future. Study of the devices is, therefore, gradually becoming compulsory for electronics specialists. The functioning of the devices, however, involve aspects of physics which are not dealt with in the available text books on the physics of semicond- tor devices. There is, therefore, a need for a book to cover all these aspects at an introductory level. The present book has been written with the aim of meeting this need. In fact, the book grew out of introductory lectures given by the author to graduate students and researchers interested in this rapidly developing area of electron devices. The book covers the subjects of heterostructure growth techniques, band-offset theory and experiments, electron states, electron-photon interaction and related phenomena, electron transport and the operation of electronic, opto-electronic and photonic quantum well devices. The theory as well as the practical aspects of the devices are discussed at length. The aim of the book is to provide a comprehensive treatment of the physics underlying the various devices. A reader after going through the book should find himself equipped to deal with all kinds of quantum well devices.
Download or read book Photoreflectance Spectroscopy of GaAs-Al/sub X/Ga/sub 1-x/As Quantum Wells Under Hydrostatic Pressure written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the first study of the effect of hydrostatic pressure on the photoreflectance (PR) spectra of GaAs - Al/sub x/Ga/sub 1/minus/x/As multiple quantum wells (MQW). As the levels in the CB move up in energy with pressure, they interfere with the L band signalled by a loss of intensity as they cross the latter. At pressures beyond 35 kbar the CB of GaAs crosses the L band of GaAs and the X band of the Al/sub x/Ga/sub 1/minus/x/As barrier. Staggered transitions across the interface from the X CB of Al/sub x/Ga/sub 1/minus/x/As to the valence band of GaAs are seen signalling the formation of a type II heterostructure beyond these pressures. The valence band offsets are deduced from this data and are in agreement with our published data of photoluminescence under pressure. The pressure dependence of the L band is also deduced from our results. 7 refs., 3 figs.
Author : Wei Chen
Publisher :
ISBN 13 :
Total Pages : 414 pages
Book Rating : 4.:/5 (312 download)
Download or read book Spectroscopy of a Two-dimensional Electron Gas in InGaAs and GaAs Single Quantum Wells written by Wei Chen and published by . This book was released on 1993 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yossi Yayon
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (884 download)
Download or read book Characterization of the Disorder in a GaAs Quantum Well by Near-field Optical Spectroscopy written by Yossi Yayon and published by . This book was released on 2003 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sujaul Chowdhury
Publisher : Springer Nature
ISBN 13 : 3031538161
Total Pages : 97 pages
Book Rating : 4.0/5 (315 download)
Download or read book Numerical Exploration of Isolated GaAs-AlGaAs Quantum Well written by Sujaul Chowdhury and published by Springer Nature. This book was released on with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wei Lu
Publisher : Springer
ISBN 13 : 3319949535
Total Pages : 245 pages
Book Rating : 4.3/5 (199 download)
Download or read book Spectroscopy of Semiconductors written by Wei Lu and published by Springer. This book was released on 2018-07-31 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: The science and technology related to semiconductors have received significant attention for applications in various fields including microelectronics, nanophotonics, and biotechnologies. Understanding of semiconductors has advanced to such a level that we are now able to design novel system complexes before we go for the proof-of-principle experimental demonstration. This book explains the experimental setups for optical spectral analysis of semiconductors and describes the experimental methods and the basic quantum mechanical principles underlying the fast-developing nanotechnology for semiconductors. Further, it uses numerous case studies with detailed theoretical discussions and calculations to demonstrate the data analysis. Covering structures ranging from bulk to the nanoscale, it examines applications in the semiconductor industry and biomedicine. Starting from the most basic physics of geometric optics, wave optics, quantum mechanics, solid-state physics, it provides a self-contained resource on the subject for university undergraduates. The book can be further used as a toolbox for researching and developing semiconductor nanotechnology based on spectroscopy.
Author : Sheng S. Li
Publisher : Springer Science & Business Media
ISBN 13 : 1461557593
Total Pages : 221 pages
Book Rating : 4.4/5 (615 download)
Download or read book Intersubband Transitions in Quantum Wells: Physics and Devices written by Sheng S. Li and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Workshop on "Intersubband Transitions in Quantum Wells:: Physics and Applications," was held at National Cheng Kung University, in Tainan, Taiwan, December 15-18, 1997. The objective of the Workshop is to facilitate the presentation and discussion of the recent results in theoretical, experimental, and applied aspects of intersubband transitions in quantum wells and dots. The program followed the tradition initiated at the 1991 conference in Cargese-France, the 1993 conference in Whistler, B. C. Canada, and the 1995 conference in Kibbutz Ginosar, Israel. Intersubband transitions in quantum wells and quantum dots have attracted considerable attention in recent years, mainly due to the promise of various applications in the mid- and far-infrared regions (2-30 J. lm). Over 40 invited and contributed papers were presented in this four-day workshop, with topics covered most aspects of the intersubband transition phenomena including: the basic intersubband transition processes, multiquantum well infrared photodetector (QWIP) physics, large format (640x480) GaAs QWIP (with 9. 0 J. lffi cutoff) focal plane arrays (FPAs) for IR imaging camera applications, infrared modulation, intersubband emission including mid- and long- wavelength quantum cascade (QC) lasers such as short (A. "" 3. 4 J. lm) and long (A. "" 11. 5 J. lm) wavelength room temperature QC lasers, quantum fountain intersubband laser at 15. 5 J. lm wavelength in GaAs/AIGaAs quantum well, harmonic generation and nonlinear effects, ultra-fast phenomena such as terahertz (THz) intersubband emission and detection. The book divides into five Chapters.
Author : Stylianos Athanasiou Choulis
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (535 download)
Download or read book Investigation of GaInNAs/GaAs Quantum Wells and Vertical-cavity Surface-emitting Laser Structures Using Modulated Reflectance Spectroscopy written by Stylianos Athanasiou Choulis and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
