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Author: Frederick August Weihe
Publisher:
ISBN:
Category :
Languages : en
Pages : 272
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Book Description
Author: Frederick August Weihe
Publisher:
ISBN:
Category :
Languages : en
Pages : 272
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Book Description
Author: Mikhail Grishin
Publisher: BoD – Books on Demand
ISBN: 953761980X
Category : Technology & Engineering
Languages : en
Pages : 642
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Book Description
Invention of the solid-state laser has initiated the beginning of the laser era. Performance of solid-state lasers improved amazingly during five decades. Nowadays, solid-state lasers remain one of the most rapidly developing branches of laser science and become an increasingly important tool for modern technology. This book represents a selection of chapters exhibiting various investigation directions in the field of solid-state lasers and the cutting edge of related applications. The materials are contributed by leading researchers and each chapter represents a comprehensive study reflecting advances in modern laser physics. Considered topics are intended to meet the needs of both specialists in laser system design and those who use laser techniques in fundamental science and applied research. This book is the result of efforts of experts from different countries. I would like to acknowledge the authors for their contribution to the book. I also wish to acknowledge Vedran Kordic for indispensable technical assistance in the book preparation and publishing.
Author: Dinh Ba Khuong
Publisher: Nova Science Publishers
ISBN: 9781626181281
Category : X-ray lasers
Languages : en
Pages : 0
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Book Description
High order harmonic generation (HHG) produced by the interaction of an intense laser pulse and a gas medium can provide a table top scale coherent radiation source in the short wavelength range from the extreme ultraviolet to the soft x-ray region. This book presents a study based on high order harmonic generation in a semi-infinite gas cell. Two novel schemes are presented which have been used to enhance the quality of the HHG source including the conversion efficiency, the coherence, and the cut-off photon energy. This book focuses on the phase matching of the non-linear conversion process which is the main limitation to the quality of the HHG source. In the first scheme, a combination of lens and axicon is used to create a Bessel Gaussian beam instead of only a Gaussian beam and the presence of a new geometrical phase mismatch term is demonstrated. This allows us to compensate for the phase mismatch and thus to enhance the phase matching condition. In the second scheme, the phase matching is controlled by a means of an off-axis beam. When the phase mismatch is varied, mainly due to a change in the dipole phase term, the harmonic emission can be destroyed or enhanced. This technique provides the possibility to generate very high harmonic photon energies.
Author: Dimitri Batani
Publisher: Springer Science & Business Media
ISBN: 9780306466151
Category : Science
Languages : en
Pages : 434
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Book Description
Proceedings of the 30th Course of the International School of Quantum Electronics on Atoms, Solids and Plasmas in Super-Intense Laser Fields, held 8-14 July, in Erice, Sicily
Author: Hanzhe Liu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
High-harmonic generation (HHG) lies at the heart of attosecond science. Since the first experimental observation of HHG in noble gases, extensive theoretical and experimental studies have been performed on HHG from gas phase medium including both noble gases as well as small molecues for the past 30 years, making HHG a valuable tool to probe attosecond dynamics in various physical and chemical systems. A recent new progress in this field is the observation of high harmonics in a crystalline bulk solid reported in the year of 2011. Fundamentally, high-harmonic generation from solids is a spectroscopy technique and understanding the mechanism will allow us to study the fundamental strong light-matter interaction processes happen at femto- and attosecond time scale in the condensed matter phase. In terms of application, observation of high-harmonics in solids such as semiconductors makes it possible to engineer and control the ultrafast strong light-matter interaction at nanoscales by patterning the solids target with subwavelength nanostructures, which could eventually lead to novel compact ultrafast photonic devices operating at extremely short wavelengths. In this thesis, we report a few experiments that reveal the fundamental mechanism responsible for solid-state high-harmonic generation as well as the control of the process at subwavelength scale by applying nanofabrication technology. The first experiment is an optical pump-probe study on HHG from a ZnO bulk crystal. The behavior of the high-harmonics signal generated from a strong probe pulse under a direct band gap linear excitation suggests that a Rabi-type of interband transition plays an important role in high-harmonic generation in solids under the experiment condition. A second experiment is the first demonstration of high-harmonic generation in a two-dimensional material (in this case, monolayer MoS$_{2}$). Based on the measured high-harmonic spectra we suggest that the Berry curvature of the material has important effects when electrons are strongly driven by the excitation field. We further find that the generation process is more efficient from monolayer compared to an equivalent layer in bulk, revealing hints of the correlation effects on the high-harmonic generation process. A third experiment covered in this thesis is to enhance and control high-harmonic generation from an all-dielectric metasurface. The enhancement of high harmonics is a direct result of the enhanced pump field in the metasurface when the device is resonantly excited. The overall harmonic yield from field-enhancing nanostructures is ultimately limited by the laser induced damage of the sample, and this motivates the last work in this thesis. In this work, we demonstrate the guiding of above-gap high harmonics in a slotted waveguide geometry by allowing high harmonics propagating in the vacuum channel with a greatly reduced absorption. Coherent propagation effects are observed, which is otherwise absent in bulk due to strong absorption. With the reduced absorption, we further demonstrate the enhanced high harmonics at high excitation intensities up to the damage threshold of the bulk.
Author: Charles Pooley
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Francesco S. Pavone
Publisher: Taylor & Francis
ISBN: 1439849153
Category : Science
Languages : en
Pages : 465
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Book Description
Second-harmonic generation (SHG) microscopy has shown great promise for imaging live cells and tissues, with applications in basic science, medical research, and tissue engineering. Second Harmonic Generation Imaging offers a complete guide to this optical modality, from basic principles, instrumentation, methods, and image analysis to biomedical a
Author: Thomas Schultz
Publisher: John Wiley & Sons
ISBN: 3527677658
Category : Science
Languages : en
Pages : 624
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Book Description
This book provides fundamental knowledge in the fields of attosecond science and free electron lasers, based on the insight that the further development of both disciplines can greatly benefit from mutual exposure and interaction between the two communities. With respect to the interaction of high intensity lasers with matter, it covers ultrafast lasers, high-harmonic generation, attosecond pulse generation and characterization. Other chapters review strong-field physics, free electron lasers and experimental instrumentation. Written in an easy accessible style, the book is aimed at graduate and postgraduate students so as to support the scientific training of early stage researchers in this emerging field. Special emphasis is placed on the practical approach of building experiments, allowing young researchers to develop a wide range of scientific skills in order to accelerate the development of spectroscopic techniques and their implementation in scientific experiments. The editors are managers of a research network devoted to the education of young scientists, and this book idea is based on a summer school organized by the ATTOFEL network.
Author: Mitsuko Murakami
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Roberto Osellame
Publisher: Springer Science & Business Media
ISBN: 364223366X
Category : Science
Languages : en
Pages : 485
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Book Description
Femtosecond laser micromachining of transparent material is a powerful and versatile technology. In fact, it can be applied to several materials. It is a maskless technology that allows rapid device prototyping, has intrinsic three-dimensional capabilities and can produce both photonic and microfluidic devices. For these reasons it is ideally suited for the fabrication of complex microsystems with unprecedented functionalities. The book is mainly focused on micromachining of transparent materials which, due to the nonlinear absorption mechanism of ultrashort pulses, allows unique three-dimensional capabilities and can be exploited for the fabrication of complex microsystems with unprecedented functionalities.This book presents an overview of the state of the art of this rapidly emerging topic with contributions from leading experts in the field, ranging from principles of nonlinear material modification to fabrication techniques and applications to photonics and optofluidics.
