Harmonic Generation by an Intense Picosecond Laser in an Underdense Plasma PDF Download
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Author: X. Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
We report both theoretical calculations and experimental observations of second harmonic (SHG) and third harmonic generation (THG) in long scale-length underdense plasmas. Second harmonic generation, normally forbidden in a uniform plasma, is allowed by a radial electron density profile that results from the laser-intensity dependent ionization. Experimental measurements of the scaling of the harmonics with density and laser intensity are presented.
Author: X. Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
We report both theoretical calculations and experimental observations of second harmonic (SHG) and third harmonic generation (THG) in long scale-length underdense plasmas. Second harmonic generation, normally forbidden in a uniform plasma, is allowed by a radial electron density profile that results from the laser-intensity dependent ionization. Experimental measurements of the scaling of the harmonics with density and laser intensity are presented.
Author: Liang Zhao
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
In this thesis, an experimental investigation of harmonic generation from high-intensity laser-plasma interactions is presented. Harmonic experiments performed on the 1-terawatt FCM-CPA laser system at the University of Toronto, and on the 10-terawatt T3 laser system at the University of Michigan, are described. Using the FCM-CPA laser, various aspects of second harmonic generation were investigated systematically, with a focus on the effect of preformed plasma on harmonic generation. Experiments comparing harmonics generated by high-contrast pulses and by pulses containing weak prepulses show that the preformed plasma causes spatial and spectral breakup of harmonics and diffuses harmonic emission into large solid angles. On the T3 laser system, mid-order harmonic generation from various solid materials was studied and both odd and even harmonics up to the 7th were observed. Important features of harmonic generation, i.e., the laser-polarization dependence and the angular distribution of harmonic emission, were characterized. Pump-probe experiments were carried out as well on both laser systems by adding a controlled prepulse, which demonstrated a strong dependence of harmonic production efficiency on the gradient of preformed plasma. We also describe what we believe to be the first observation of regular satellite features accompanying the mid-order harmonics. Their dependence on target materials and on laser intensity was measured, and possible physical explanations are discussed. Besides, the development of the Toronto FCM-CPA laser system is summarized. Its original design and unique features are described in detail.
![Experimental Studies of Harmonic Generation from Solid-density Plasmas Produced by Picosecond Ultra-intense Laser Pulses [microform] PDF](https://books.google.com/books/content/images/frontcover/7rRSXwAACAAJ?fife=w80-h100)
Author: Liang Zhao
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612415393
Category :
Languages : en
Pages : 136
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Author: Rashid A. Ganeev
Publisher: World Scientific
ISBN: 1848169809
Category : Science
Languages : en
Pages : 250
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Book Description
This book represents the first comprehensive treatment of high-order harmonic generation in laser-produced plumes, covering the principles, past and present experimental status and important applications. It shows how this method of frequency conversion of laser radiation towards the extreme ultraviolet range matured over the course of multiple studies and demonstrated new approaches in the generation of strong coherent short-wavelength radiation for various applications. Significant discoveries and pioneering contributions of researchers in this field carried out in various laser scientific centers worldwide are included in this first attempt to describe the important findings in this area of nonlinear spectroscopy. High-Order Harmonic Generation in Laser Plasma Plumes is a self-contained and unified review of the most recent achievements in the field, such as the application of clusters (fullerenes, nanoparticles, nanotubes) for efficient harmonic generation of ultrashort laser pulses in cluster-containing plumes and resonance-induced enhancement of harmonic yield. It can be used as an advanced monograph for researchers and graduate students working in the field of nonlinear spectroscopy. It is also suitable for researchers in laser physics and nonlinear optics who wish to have an overview of the advanced achievements in laser ablation-induced high-order harmonic generation spectroscopy. The carefully presented details of this book will be of value to research devoted to the understanding and control frequency conversion of laser pulses in plasma plumes. The studies described in this book pave the way for the development of a new method of materials studies using the laser ablation-induced high-order harmonic generation spectroscopy, which can exploit the spectral and structural properties of various solid-state materials through their ablation and further propagation of short laser pulse through laser-produced plasma and generation of high-order harmonics.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Rashid A. Ganeev
Publisher: CRC Press
ISBN: 9814463310
Category : Science
Languages : en
Pages : 306
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Book Description
Plasma harmonics is a new field of laser spectroscopy. The use of the solid elements of the periodic table, together with thousands of complex solid-state samples, largely extends the range of materials employed in plasma harmonics in contrast to the few light rare gases that are typically used. Thus the exploration of practically any available sol
Author: Atsushi Ishizawa
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Author: Rashid A. Ganeev
Publisher: CRC Press
ISBN: 9814463302
Category : Science
Languages : en
Pages : 322
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Book Description
Plasma harmonics is a new field of laser spectroscopy. The use of the solid elements of the periodic table, together with thousands of complex solid-state samples, largely extends the range of materials employed in plasma harmonics in contrast to the few light rare gases that are typically used. Thus the exploration of practically any available solid-state material through nonlinear spectroscopy comprising laser ablation and harmonic generation can be considered a new tool for materials science. Plasma harmonic spectroscopy exploits the spectral and structural properties of various ablated solid-state materials by propagating short laser pulses through laser-produced plasma and generating high-order harmonics of ultrashort laser pulses. The book describes the special features of plasma harmonics in laser-produced ablation plumes and discusses a wide range of nonlinear medium characteristics that can be produced by varying the conditions of laser plume production on the surface of a solid. This book compiles and details cutting-edge research in science and medicine from the interdisciplinary team of the Michigan Nanotechnology Institute for Medicine and Biological Sciences, who are currently revolutionizing drug delivery techniques through the development of engineered nanodevices. Edited by Istvan J Majoros and James Baker, Jr., two prominent nanotechnology researchers, this book is designed for workers involved in nanotechnology, macromolecular science, cancer therapy, or drug delivery research.
Author: S. Moustaizis
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
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Book Description
Author: Philip H. Bucksbaum
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 330
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Book Description
