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Optical Interferometry

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ISBN: 9789535129554 9789535129561 Year: Pages: 260 DOI: 10.5772/63683 Language: English
Publisher: IntechOpen
Subject: Optics and Lights
Added to DOAB on : 2019-10-03 07:51:49

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Optical methods of measurements are the most sensitive techniques of noncontact investigations, and at the same time, they are fast as well as accurate which increases reproducibility of observed results. In recent years, the importance of optical interferometry methods for research has dramatically increased, and applications range from precise surface testing to finding extrasolar planets. This book covers various aspects of optical interferometry including descriptions of novel apparatuses and methods, application interferometry for studying biological objects, surface qualities, materials characterization, and optical testing. The book includes a series of chapters in which experts share recent progress in interferometry through original research and literature reviews.

Quantum Cascade Lasers

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ISBN: 9789535130611 9789535130628 Year: Pages: 118 DOI: 10.5772/62674 Language: English
Publisher: IntechOpen
Subject: Optics and Lights
Added to DOAB on : 2019-10-03 07:51:49

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The book Quantum Cascade Lasers is divided into two sections. More specifically, in Section 1, the calculations on the band structure of cascade lasers and on the electronic band structure of QCL (e.g., transfer matrix technique, finite element method, and variational method, among others) under the existence of an applied electric field are presented. Moreover, a detailed investigation of electrical and optoelectronic properties of multiple-quantum-well structure is carried out. Furthermore, a theoretical study on the intensity noise characteristics of quantum-cascade lasers under the external noncoherent optical injection is carried out. This section ends with an important description on growth methods for QCLs and the possibility of developing GaN-based QCLs among other materials. A few applications of cascade laser structures like power amplification and THz applications are presented, among others, in Section 2. The THz QCL design and fabrication toward the high-temperature and large-average output power operations for the real applications are described. Furthermore, the importance of the power amplification and coherent combination techniques to improve the output power maintaining the single-mode operation is presented.

Ellipsometry - Principles and Techniques for Materials Characterization

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ISBN: 9789535136231 9789535136248 Year: Pages: 162 DOI: 10.5772/65558 Language: English
Publisher: IntechOpen
Subject: Optics and Lights
Added to DOAB on : 2019-10-03 07:51:50

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Ellipsometry is rapidly emerging as a popular solution addressed to new materials science challenges and technological pitfalls hindering its effective application on modern problems. Amid the nowadays active development of materials of top notch, ellipsometry is also evolving rapidly both in the academic and industry sectors. The global industry strategies, introduce the latest scientific advances at manufacturing new, more accurate, and reliable ellipsometry systems to tackle emerging challenges. The book provides a comprehensive overview on the principles and technical capabilities of the modern ellipsometry highlighting its versatility in materials characterization.

X-ray Scattering

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ISBN: 9789535128878 9789535128885 9789535141204 Year: Pages: 228 DOI: 10.5772/62609 Language: English
Publisher: IntechOpen
Subject: Optics and Lights
Added to DOAB on : 2019-10-03 09:47:10

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X-ray scattering techniques are a family of nondestructive analytical techniques. Using these techniques, scientists obtain information about the crystal structure and chemical and physical properties of materials. Nowadays, different techniques are based on observing the scattered intensity of an X-ray beam hitting a sample as a function of incident and scattered angle, polarization, and wavelength. This book is intended to give overviews of the relevant X-ray scattering techniques, particularly about inelastic X-ray scattering, elastic scattering, grazing-incidence small-angle X-ray scattering, small-angle X-ray scattering, and high-resolution X-ray diffraction, and, finally, applications of X-ray spectroscopy to study different biological systems.

Laser Ablation - From Fundamentals to Applications

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ISBN: 9789535136996 9789535137009 9789535140221 Year: Pages: 290 DOI: 10.5772/67961 Language: English
Publisher: IntechOpen
Subject: Physics (General)
Added to DOAB on : 2019-10-03 07:51:50

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Shortly after the demonstration of the first laser, the most intensely studied theoretical topics dealt with laser-matter interactions. Many experiments were undertaken to clarify the major ablation mechanisms. At the same time, numerous theoretical studies, both analytical and numerical, were proposed to describe these interactions. These studies paved the ways toward the development of numerous laser applications, ranging from laser micro- and nanomachining to material analysis, nanoparticle and nanostructure formation, thin-film deposition, etc. Recently, more and more promising novel fields of laser applications have appeared, including biomedicine, catalysis, photovoltaic cells, etc. This book intends to provide the reader with a comprehensive overview of the current state of the art in laser ablation, from its fundamental mechanisms to novel applications.

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