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Control Of Free Electrons With Ultrafast Laser Pulsesgeneration Of Attosecond Electron Pulse Trains
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Book Synopsis Control of Free Electrons with Ultrafast Laser Pulses:Generation of Attosecond Electron Pulse Trains by : Norbert Schönenberger
Download or read book Control of Free Electrons with Ultrafast Laser Pulses:Generation of Attosecond Electron Pulse Trains written by Norbert Schönenberger and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrafast Control of Electrons Using Few-cycle Laser Pulses by : Antonio J. Garzón-Ramírez
Download or read book Ultrafast Control of Electrons Using Few-cycle Laser Pulses written by Antonio J. Garzón-Ramírez and published by . This book was released on 2021 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The latest advances in laser technology now enable the generation and control of few-cycle lasers in the IR and UV/Vis. Using them it is now possible to apply laser fields with intensities of 10^13-10^14 W/cm^2 before the emergence of dielectric breakdown. At those intensities the incident light can dramatically distort the electronic structure of nanoscale systems and bulk matter thus opening unprecedented opportunities to manipulate electronic properties and dynamics on a femto to attosecond timescale. In this thesis, we investigate general strategies for the control of matter at the level of electrons using few-cycle laser. First we introduce a control scenario based on the Stark effect that we call SCELI, which is short for the "Stark Control of ELectron dynamics at Interfaces". The scenario uses the Stark effect induced by non-resonant light of intermediate intensity (non-perturbative but non-ionizing) to create transient resonances among the energy levels of two adjacent materials. These transient resonances open quantum tunneling pathways for interfacial charge transfer that are otherwise forbidden in undriven systems, thus providing key opportunities for the ultrafast control of electrons in matter. SCELI is of general applicability and we computationally demonstrate it by following the quantum dynamics driven by non-resonant laser pulses along semiconductor-semiconductor and molecule-semiconductor interfaces. As shown, SCELI is robust to decoherence, changes in the laser frequency and amplitude, energy level alignments between the materials of the heterojunction and survives even in the presence of interfacial band bending and electromagnetic screening. We demonstrate how to use SCELI to turn an insulating heterojunction into a conducting one on a femtosecond timescale, to generate phase controllable currents in the absence of bias voltage and to induce interfacial charge transfer when resonant routes are not available and/or in timescales faster than those offered by resonant routes. This collection of results demonstrate the general utility of Stark based strategies for the control of electrons. Second, we unveil a general mechanistic feature in emerging experiments that employ few-cycle lasers to generate currents on femtosecond timescale in nanojunctions and that have lead to the birth of the field of petahertz electronics. Through a theory-experiment collaboration, in the context of atomically thin semimetal graphene coupled to metallic electrodes, we demonstrate that the optical generation of currents has contributions arising from the photogeneration of real and virtual charge carriers. Further, we isolate carrier-envelope signatures of each contribution that allow decomposing the observed current into these two components. These advances offer direct means to optically monitor these charge carriers as needed for the design of future lightwave petaherz electronics"--Pages vi-vii
Book Synopsis Tracking Charge Migration with Attosecond X-ray Pulses from a Free-electron Laser by : Jordan Tyler O'Neal
Download or read book Tracking Charge Migration with Attosecond X-ray Pulses from a Free-electron Laser written by Jordan Tyler O'Neal and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motion of electrons in molecular superposition states happens on the attosecond timescale, roughly three orders of magnitude faster than nuclear motion. To study the first steps in a photochemical reaction, then, we must study the electron dynamics in early times before the nuclei have a chance to move. These purely electronic dynamics, uncoupled from nuclear motion, are dubbed charge migration (CM). CM can be described as a coherent superposition of delocalized electronic states evolving in time, which appears as a time-dependent oscillation in charge density across the molecule. On longer timescales, thought to be tens of femtoseconds, nuclear motion couples to the pure electronic CM. This tends to average out the CM, and there is evidence that this process can influence the nuclear reaction pathways. One can further envision using sequences of laser pulses to prepare CM states as a method of coherent control directing photochemical reaction pathways. However, understanding the loss of electronic coherence as nuclear motion occurs is difficult. Theoretical modeling of CM is computationally challenging, and there are open questions about the effects of nuclear motion. Experimental measurements can guide us towards better, more efficient approximations to help answer these outstanding questions. To this end, I present two experiments towards developing two separate methods for measuring CM. Both methods rely on the recently developed attosecond X-ray free-electron laser source at the LCLS free-electron laser facility. These two methods for measuring CM serve as early implementations of this new attosecond X-ray source. The first method to study CM, impulsive ionization, prepares a CM state by ionizing with an attosecond X-ray pulse which has coherent bandwidth large enough to populate multiple cationic states. The final state is then measured with X-ray absorption spectroscopy. I present preliminary results showing signatures of CM and nuclear motion damping the time-dependent charge density. The second method, nonlinear X-ray spectroscopy, is a sophisticated toolset using sequences of X-ray pulses to prepare and measure CM states. I present a measurement of a basic building block of nonlinear X-ray spectroscopy, impulsive stimulated X-ray Raman scattering, and use this result to show the feasibility in the near future of measuring valence CM states in a neutral molecule.
Book Synopsis Ultrashort Laser Pulse Phenomena by : Jean-Claude Diels
Download or read book Ultrashort Laser Pulse Phenomena written by Jean-Claude Diels and published by Elsevier. This book was released on 2006-09-21 with total page 675 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrashort Laser Pulse Phenomena, Second Edition serves as an introduction to the phenomena of ultra short laser pulses and describes how this technology can be used to examine problems in areas such as electromagnetism, optics, and quantum mechanics. Ultrashort Laser Pulse Phenomena combines theoretical backgrounds and experimental techniques and will serve as a manual on designing and constructing femtosecond ("faster than electronics") systems or experiments from scratch. Beyond the simple optical system, the various sources of ultrashort pulses are presented, again with emphasis on the basic concepts and how they apply to the design of particular sources (dye lasers, solid state lasers, semiconductor lasers, fiber lasers, and sources based on frequency conversion). Provides an easy to follow guide through "faster than electronics" probing and detection methods THE manual on designing and constructing femtosecond systems and experiments Discusses essential technology for applications in micro-machining, femtochemistry, and medical imaging
Book Synopsis Strong Field Laser Physics by : Thomas Brabec
Download or read book Strong Field Laser Physics written by Thomas Brabec and published by Springer. This book was released on 2008-08-17 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the rapid progress in laser technology a wealth of novel fundamental and applied applications of lasers in atomic and plasma physics have become possible. This book focuses on the interaction of high intensity lasers with matter. It reviews the state of the art of high power laser sources, intensity laser-atom and laser-plasma interactions, laser matter interaction at relativistic intensities, and QED with intense lasers.
Book Synopsis Beam Acceleration In Crystals And Nanostructures - Proceedings Of The Workshop by : Gerard Mourou
Download or read book Beam Acceleration In Crystals And Nanostructures - Proceedings Of The Workshop written by Gerard Mourou and published by . This book was released on 2020 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Spectroscopy 2 by : Wolfgang Demtröder
Download or read book Laser Spectroscopy 2 written by Wolfgang Demtröder and published by Springer. This book was released on 2015-01-07 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keeping abreast of the latest techniques and applications, this new edition of the standard reference and graduate text on laser spectroscopy has been completely revised and expanded. While the general concept is unchanged, the new edition features a broad array of new material, e.g., ultrafast lasers (atto- and femto-second lasers), coherent matter waves, Doppler-free Fourier spectroscopy, interference spectroscopy, quantum optics and gravitational waves and still more applications in chemical analysis, medical diagnostics, and engineering.
Book Synopsis Pulsed Laser Ablation of Solids by : Mihai Stafe
Download or read book Pulsed Laser Ablation of Solids written by Mihai Stafe and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book introduces ‘the state of the art' of pulsed laser ablation and its applications. It is based on recent theoretical and experimental studies. The book reaches from the basics to advanced topics of pulsed laser ablation. Theoretical and experimental fundamental phenomena involved in pulsed laser ablation are discussed with respect to material properties, laser wavelength, fluence and intensity regime of the light absorbed linearly or non-linearly in the target material. The energy absorbed by the electrons leads to atom/molecule excitation, ionization and/or direct chemical bond breaking and is also transferred to the lattice leading to material heating and phase transitions. Experimental non-invasive optical methods for analyzing these phenomena in real time are described. Theoretical models for pulsed laser ablation and phase transitions induced by laser beams and laser-vapour/plasma interaction during the plume expansion above the target are also presented. Calculations of the ablation speed and dimensions of the ablated micro- and nano-structures are performed. The validity and required refinement of different models in different experimental conditions is provided. The pulsed laser deposition process which bases on collecting the ablated particles on a surface is analyzed in terms of efficiency and quality of the deposited films as a function of ambient conditions, target material, laser parameters and substrate characteristics. The interaction between the incident laser and the ablation plasma is analyzed with respect to its influence on the structures of the deposited films and its capacity to generate high harmonics and single attosecond pulses which are highly desirable in pump-probe experiments.
Download or read book Ultrafast Biophotonics written by P. Vasa and published by Springer. This book was released on 2016-07-12 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents emerging contemporary optical techniques of ultrafast science which have opened entirely new vistas for probing biological entities and processes. The spectrum reaches from time-resolved imaging and multiphoton microscopy to cancer therapy and studies of DNA damage. The book displays interdisciplinary research at the interface of physics and biology. Emerging topics on the horizon are also discussed, like the use of squeezed light, frequency combs and terahertz imaging as the possibility of mimicking biological systems. The book is written in a manner to make it readily accessible to researchers, postgraduate biologists, chemists, engineers, and physicists and students of optics, biomedical optics, photonics and biotechnology.
Book Synopsis Laser - Surface Interactions by : Rashid A. Ganeev
Download or read book Laser - Surface Interactions written by Rashid A. Ganeev and published by Springer Science & Business Media. This book was released on 2013-10-17 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about the interaction of laser radiation with various surfaces at variable parameters of radiation. As a basic principle of classification we chose the energetic or intensity level of interaction of laser radiation with the surfaces. These two characteristics of laser radiation are the most important parameters defining entire spectrum of the processes occurring on the surfaces during interaction with electromagnetic waves. This is a first book containing a whole spectrum of the laser-surface interactions distinguished by the ranges of used laser intensity. It combines the surface response starting from extremely weak laser intensities (~1 W cm-2) up to the relativistic intensities (~1020 W cm-2 and higher). The book provides the basic information about lasers and acquaints the reader with both common applications of laser-surface interactions (laser-related printers, scanners, barcode readers, discs, material processing, military, holography, medicine, etc) and unusual uses of the processes on the surfaces under the action of lasers (art conservation, rangefinders and velocimeters, space and earth explorations, surface engineering and ablation, and others). The scientific applications of laser-surfaces interactions (surface optical nonlinearities, surface enhanced Raman spectroscopy, surface nanostructuring, nanoripples and clusters formation, X-ray lasers and harmonic generation from the surfaces) are discussed from the point of view of the close relations between the properties of surface and matter, which is a cornerstone of most of studies of materials. The novelty of the approach developed in Laser - Surface Interactions is related with the interconnection of scientific studies with numerous applications of the laser-surface interactions separated in different chapters by the ranges of laser intensities. We present most recent achievements in this field. The book provides valuable information for different ranges of reader's preparedness to the laser-related topics (from unprepared readers, to students, engineers and researchers, professionals and academics).
Book Synopsis Ultrafast Optics V by : Shuntaro Watanabe
Download or read book Ultrafast Optics V written by Shuntaro Watanabe and published by Springer. This book was released on 2014-11-22 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together in a single volume the most up-to-date results in the field presented at Ultrafast Optics and Applications of High Field and Short Wavelength Sources 2005. The volume contains keynote and invited contributions together with carefully selected regular contributions. The book aims at the highest level of presentation to make it useful as a reference for those working in the field.
Book Synopsis Fundamentals of Attosecond Optics by : Zenghu Chang
Download or read book Fundamentals of Attosecond Optics written by Zenghu Chang and published by CRC Press. This book was released on 2016-04-19 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Attosecond optical pulse generation, along with the related process of high-order harmonic generation, is redefining ultrafast physics and chemistry. A practical understanding of attosecond optics requires significant background information and foundational theory to make full use of these cutting-edge lasers and advance the technology toward the n
Book Synopsis Frequency-Resolved Optical Gating: The Measurement of Ultrashort Laser Pulses by : Rick Trebino
Download or read book Frequency-Resolved Optical Gating: The Measurement of Ultrashort Laser Pulses written by Rick Trebino and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Frequency-Resolved Optical-Gating (FROG) technique has revolutionized our ability to measure and understand ultrashort laser pulses. This book contains everything you need to know to measure even the shortest, weakest, or most complex ultrashort laser pulses. Whether you're an undergrad or an advanced researcher, you'll find easy-to-understand descriptions of all the key ideas behind all the FROG techniques, all the practical details of pulse measurement, and many new directions of research. This book is not like any other scientific book. It is a lively discussion of the basic concepts. It is an advanced treatment of research-level issues.
Book Synopsis High-Intensity Lasers for Nuclear and Physical Applications by : Margherita Zavelani-Rossi
Download or read book High-Intensity Lasers for Nuclear and Physical Applications written by Margherita Zavelani-Rossi and published by Società Editrice Esculapio. This book was released on 2022-01-01 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the book is to provide a comprehensive and unified description of high-intensity short laser pulses and their applications at the simplest level compatible with a correct physical understanding. The idea is to provide an intuitive picture of the phenomena under consideration with simple mathematical description useful for a better understanding. The book is based on the teaching experience of the graduate course of the Politecnico di Milano “HIGH INTENSITY LASERS FOR NUCLEAR AND PHYSICAL APPLICATIONS I + II” and is particularly addressed to graduate students with a background in electromagnetism; is mostly suitable for master students in Nuclear Engineering, in Engineering Physics, and in Physics and It’s recommended also to students in material sciences (or similar) and to PhD students. The text organization is due to help to follow the lessons in the classroom and to be used for self-study by students.
Book Synopsis Progress in Ultrafast Intense Laser Science III by : See Leang Chin
Download or read book Progress in Ultrafast Intense Laser Science III written by See Leang Chin and published by Springer Science & Business Media. This book was released on 2008-01-23 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PUILS series presents Progress in Ultrafast Intense Laser Science. This third volume in the series covers a diverse range of disciplines, focusing on such topics as strong field ionization of atoms, ionization and fragmentation of molecules and clusters, generation of high-order harmonics and attosecond pulses, filamentation and laser plasma interaction, and the development of ultrashort and ultrahigh-intensity light sources.
Book Synopsis High Power Laser-Matter Interaction by : Peter Mulser
Download or read book High Power Laser-Matter Interaction written by Peter Mulser and published by Springer Science & Business Media. This book was released on 2010-07-05 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and handbook to high-power laser-matter interaction, laser generated plasma, nonlinear waves, particle acceleration, nonlinear optics, nonlinear dynamics, radiation transport, it provides a systematic review of the major results and developments of the past 25 years.
Book Synopsis Optical Coating Technology by : Philip Baumeister
Download or read book Optical Coating Technology written by Philip Baumeister and published by SPIE Press. This book was released on 2004 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt: Baumeister organizes this book around the key subjects associated with functions of optical thin film performance, and provides a valuable resource in the field of thin film technology. The information is widely backed up with citations to patents and published literature. The author draws from 25 years of experience teaching classes at the UCLA Extension Program, and at companies worldwide to answer questions, such as: what are the conventions for a given analysis formalism? and, what other design approaches have been tried for this application?
