Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 69
Book Description
Modelling of Optical Properties of Strained Quantum Wells Including Free Carrier and Electric Field Effects
Author: Scientific and Technical Aerospace Reports
Author: Quantum Wells: Physics And Electronics Of Two-dimensional Systems
Author: Alexander ShikPublisher: World Scientific
ISBN: 9814496863
Category : Science
Languages : en
Pages : 106
Book Description
This invaluable book is devoted to the physics, technology and device applications of semiconductor structures with ultrathin layers where the electronic properties are governed by the quantum-mechanical laws. Such structures called quantum wells or structures with the two-dimensional electron gas, have become one of the most actively investigated objects in modern solid state physics. Electronic properties of quantum wells differ dramatically from those of bulk semiconductors, which allows one to observe new types of physical phenomena, such as the quantum Hall effect and many other so-far-unknown kinetic and optical effects. This, in turn, offers wide opportunities for creating semiconductor devices based on new principles, and it has give birth to the new branch of electronics called nanoelectronics.
Optical Properties of GaAs Coupled Quantum Wells and Superlattices
Author: Arnel Angud SalvadorPublisher:
ISBN:
Category :
Languages : en
Pages : 226
Book Description
Many-body Effects and Optical Nonlinearities in Semiconductor Quantum Wells
Author: Mark P. MullanePublisher:
ISBN:
Category : Quantum theory
Languages : en
Pages : 138
Book Description
A comprehensive model for the semiconductor quantum well is developed, which includes the effects of quantum confinement and strain, as well as many-body (Coulomb) effects. The model is applied in two regimes: the high carrier density regime associated with gain, and the low carrier density regime where the medium is absorbing. The linewidth enhancement factor (a-parameter) describes the carrier-induced relationship between gain and index changes in a semiconductor, and plays a key role in many aspects of semiconductor laser operation, particularly those associated with modulation and feedback. In this thesis we examine in detail the relevant contributions to the a-parameter, highlighting the significant influence of many-body effects. We then study of the effects of device structure and composition, discussing ways of minimising a in the context of device design. The device operating regime is found to be critically important, and the quantum well width is also found to play a role. We also explore the qualitative differences between compressive and tensile strained quantum wells, and their respective sensitivity to operating conditions. Semiconductor quantum wells also display very interesting and useful properties in the low carrier density regime, where the medium is absorbing. Particularly interesting are the saturating properties near the excitonic peak, and the effects of carrier (plasma) temperature. The possibility of significant carrier cooling under short pulse excitation near the bandedge has been highlighted, and we explore the impact of such carrier cooling on the saturation characteristics. A spectral regime of enhanced fast saturation is identified, which could provide a mechanism for previously observed mode-locking behaviour.
International Aerospace Abstracts
Author: Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 790
Book Description
Optical Properties of Solids
Author: Frederick WootenPublisher: Academic Press
ISBN: 1483220761
Category : Science
Languages : en
Pages : 273
Book Description
Optical Properties of Solids covers the important concepts of intrinsic optical properties and photoelectric emission. The book starts by providing an introduction to the fundamental optical spectra of solids. The text then discusses Maxwell's equations and the dielectric function; absorption and dispersion; and the theory of free-electron metals. The quantum mechanical theory of direct and indirect transitions between bands; the applications of dispersion relations; and the derivation of an expression for the dielectric function in the self-consistent field approximation are also encompassed. The book further tackles current-current correlations; the fluctuation-dissipation theorem; and the effect of surface plasmons on optical properties and photoemission. People involved in the study of the optical properties of solids will find the book invaluable.
Properties of III-V Quantum Wells and Superlattices
Author: P. K. BhattacharyaPublisher: IET
ISBN: 9780852968819
Category : Electronic books
Languages : en
Pages : 238
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: