Gaas Algaas Far Infrared Quantum Cascade Laser

This book describes the physics, fabrication technology, and applications of the quantum cascade laser.

A state-of-the-art overview of this rapidly expanding field, featuring fundamental theory, practical applications, and real-life examples.

The objectives of this program were threefold: to reproduce the quantum cascade laser results from Bell Labs in a production environment, to demonstrate the quantum cascade laser at longer wavelengths, and to extend the technology to the GaAs/AlGaAs material system in order to make the lasers easier to produce. After characterization with 5-crystal x-ray diffraction and photoluminescence to verify the material quality three laser wafers, with anticipated operating wavelengths near 4.5 microns and 8.5 microns, were grown, processed, and tested for this program. Although we were able to successfully grow the very thick lattice matched layers necessary for these devices, no lasing or electroluminescence was observed from any of the samples. Another laser design was produced based on the reported quantum cascade laser structures, but utilizing GaAs and AlGaAs materials instead of InGaAs and InAlAs; however, because of the negative results with the InGaAs/InAlAs structure and additional design uncertainties for the AlGaAs materials, this structure was not grown. This report will discuss in detail the work that was performed on the contract, possible cause for the negative results, and conclusions drawn from the work.

The book presents information about Terahertz science, Terahertz photodetectors and Terahertz Lasers. A special emphasis is given to room temperature operation of long wavelength photodetectors based on novel quantum dots (Centered Defect Spherical Quantum Dots). Moreover, a complete analysis of systems based on Quantum Cascade structures to detect far infrared wavelengths is provided. Finally, the book presents Terahertz laser principles considering multi-color lasers in this range of wavelengths. Written as a background for graduate students in the Optics field.

A distinctive discussion of the nonlinear dynamical phenomena of semiconductor lasers. The book combines recent results of quantum dot laser modeling with mathematical details and an analytic understanding of nonlinear phenomena in semiconductor lasers and points out possible applications of lasers in cryptography and chaos control. This interdisciplinary approach makes it a unique and powerful source of knowledge for anyone intending to contribute to this field of research. By presenting both experimental and theoretical results, the distinguished authors consider solitary lasers with nano-structured material, as well as integrated devices with complex feedback sections. In so doing, they address such topics as the bifurcation theory of systems with time delay, analysis of chaotic dynamics, and the modeling of quantum transport. They also address chaos-based cryptography as an example of the technical application of highly nonlinear laser systems.

Semiconductors are at the heart of modern living. Almost everything we do, be it work, travel, communication, or entertainment, all depend on some feature of semiconductor technology. Comprehensive Semiconductor Science and Technology, Six Volume Set captures the breadth of this important field, and presents it in a single source to the large audience who study, make, and exploit semiconductors. Previous attempts at this achievement have been abbreviated, and have omitted important topics. Written and Edited by a truly international team of experts, this work delivers an objective yet cohesive global review of the semiconductor world. The work is divided into three sections. The first section is concerned with the fundamental physics of semiconductors, showing how the electronic features and the lattice dynamics change drastically when systems vary from bulk to a low-dimensional structure and further to a nanometer size. Throughout this section there is an emphasis on the full understanding of the underlying physics. The second section deals largely with the transformation of the conceptual framework of solid state physics into devices and systems which require the growth of extremely high purity, nearly defect-free bulk and epitaxial materials. The last section is devoted to exploitation of the knowledge described in the previous sections to highlight the spectrum of devices we see all around us. Provides a comprehensive global picture of the semiconductor world Each of the work's three sections presents a complete description of one aspect of the whole Written and Edited by a truly international team of experts