Download or read book Strong Field Phenomena in Atoms and Molecules from Near to Midinfrared Laser Fields written by Yu Hang Lai and published by . This book was released on 2018 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: While most of the early experiments were performed in the near-infrared (NIR)(0.8 or 1 $\mu$m) wavelengths, an important advance over the last decade has been the emergence of intense mid-infrared (MIR)($\sim 2-4$ $\mu$m) sources. The quadratic scaling of $U_p$ with wavelength benefits the study of recollision-driven phenomena and also enables the exploration of strong field interaction deep in the tunneling regime. In addition, the MIR regime is of particular interest for studying molecules due to the presence of vibrational resonances. In this dissertation, we explore several strong field phenomena in atoms and molecules with near and mid infrared fields, including:
Download or read book Theoretical Femtosecond Physics written by Frank Grossmann and published by Springer. This book was released on 2010-11-20 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume offers theoretical investigations of atoms and molecules interacting with pulsed or continuous wave lasers. Theoretical background is included, and the text incorporates several exercises. Additional calculations are performed in the appendices.
Download or read book Advances of Atoms and Molecules in Strong Laser Fields written by Yunquan Liu and published by World Scientific Publishing Company. This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the latest advancements and future perspectives of atomic, molecular and optical (AMO) physics and its vital role in modern sciences and technologies. The chapters are devoted to a wide range of quantum systems, with an emphasis on the understanding of ionization, high-harmonic generation, molecular orbital imaging and coherent control phenomena originating from light-matter interactions. The book overviews current research landscape and highlight major scientific trends in AMO physics interfacing with interdisciplinary sciences. It may be particularly interesting for young researchers working on establishing their scientific interests and goals.
Download or read book Atoms and Clusters in Strong Laser Fields written by Tatiana Marchenko and published by . This book was released on 2008 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atoms and Molecules in Laser and External Fields written by Man Mohan and published by Alpha Science International, Limited. This book was released on 2008 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent evolution of lasers and other external field (e.g. Synchrotron radiation, strong electric and magnetic fields) sources is opening up new frontiers of science which cover explorations in broad areas ranging from atomic, molecular and optical physics (AMOP) to nuclear fusion and high energy particle physics; even further to astrophysics and cosmology. Atomic and molecular dynamics is being explored at the femto and near atto- second time scale. Ultra-intense laser and other external fields attracting vigorous attention and interest from the view point of their control. The topics covered in the book are: Applications of ultra-intense ultra-short pulse lasers; Atoms, molecules and clusters in strong laser and other external fields; high field chemistry; high harmonic generation (HHG), X-ray generation by laser matter interactions and their applications, collisions in laser fields, relativistic particle generation and acceleration by super-strong laser plasma interactions etc.
Download or read book Atoms and Molecules in Strong Midinfrared Laser Fields written by Cosmin Ioan Blaga and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecules in Laser Fields written by André D. Bandrauk and published by CRC Press. This book was released on 1993-12-14 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents the major advances in both intense laser fields phenomena and laser control of photochemical reactions - highlighting experimental and theoretical research on the interaction of simple molecules with intense laser fields. The book introduces new concepts such as above-threshold ionization (ATI), above-threshold dissociation (ATD), laser-induced avoided crossings, and coherent control.
Download or read book Atoms in Intense Laser Fields written by C. J. Joachain and published by Cambridge University Press. This book was released on 2011-12-15 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of lasers capable of producing high-intensity pulses has opened a new area in the study of light-matter interactions. The corresponding laser fields are strong enough to compete with the Coulomb forces in controlling the dynamics of atomic systems and give rise to multiphoton processes. This book presents a unified account of this rapidly developing field of physics. The first part describes the fundamental phenomena occurring in intense laser-atom interactions and gives the basic theoretical framework to analyze them. The second part contains a detailed discussion of Floquet theory, the numerical integration of the wave equations and approximation methods for the low- and high-frequency regimes. In the third part, the main multiphoton processes are discussed: multiphoton ionization, high harmonic and attosecond pulse generation, and laser-assisted electron-atom collisions. Aimed at graduate students in atomic, molecular and optical physics, the book will also interest researchers working on laser interactions with matter.
Download or read book Molecules and Clusters in Intense Laser Fields written by Jan Posthumus and published by Cambridge University Press. This book was released on 2001-06-28 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough introduction to the subject, covering theory and experiments, for graduates and researchers.
Download or read book Atoms Solids and Plasmas in Super Intense Laser Fields written by Dimitri Batani and published by Springer. This book was released on 2012-05-31 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent developement of high power lasers, delivering femtosecond pulses of 20 2 intensities up to 10 W/cm , has led to the discovery of new phenomena in laser interactions with matter. At these enormous laser intensities, atoms, and molecules are exposed to extreme conditions and new phenomena occur, such as the very rapid multi photon ionization of atomic systems, the emission by these systems of very high order harmonics of the exciting laser light, the Coulomb explosion of molecules, and the acceleration of electrons close to the velocity of light. These phenomena generate new behaviour of bulk matter in intense laser fields, with great potential for wide ranging applications which include the study of ultra-fast processes, the development of high-frequency lasers, and the investigation of the properties of plasmas and condensed matter under extreme conditions of temperature and pressure. In particular, the concept of the "fast ignitor" approach to inertial confinement fusion (ICF) has been proposed, which is based on the separation of the compression and the ignition phases in laser-driven ICF. The aim of this course on "Atom, Solids and Plasmas in Super-Intense Laser fields" was to bring together senior researchers and students in atomic and molecular physics, laser physics, condensed matter and plasma physics, in order to review recent developments in high-intensity laser-matter interactions. The course was held at the Ettore Majorana International Centre for Scientific Culture in Erice from July 8 to July 14,2000.
Download or read book Super Intense Laser Atom Physics written by A. L'Huillier and published by Springer. This book was released on 2012-06-14 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid development of powerful pulsed lasers is at the origin of a conside rable interest in studying the response of an atom, a molecule (or a solid) to a strong electromagnetic field. It is now possible to produce at the laboratory scale, ultra-short 13 pulses with a duration of 100 femtoseconds (10- second) and a power of the order 12 of 1 terawatt (10 Watt). Under these conditions, very high peak intensities may be obtained and electric fields exceeding typical electron binding fields in atoms are generated. The interaction of an atom or a molecule with such electromagnetic fields has a highly non-linear character which leads to unexpected phenomena. Amongst them, - above-threshold ionization (ATI) i.e. the absorption of additional photons in excess of the minimal number necessary to overcome the ionization potential and its molecular counterpart, above-threshold dissociation (ATD); - generation of very high harmonics of the driving field; - stabilization of one-electron systems in strong fields. These processes were the main topics of two international meetings which were held in 1989 and 1991 in the United States under the common name SILAP (Super-Intense Laser-Atom Physics).
Download or read book Multielectron Effects of Diatomic Molecules in Strong Laser Fields written by Chunlei Guo and published by . This book was released on 1999 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Intense Laser Phenomena And Related Subjects Proceedings Of Ix International School On Coherent Optics written by M Yu Ivanov and published by World Scientific. This book was released on 1991-01-10 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lectures presented in this book reflect well the new results and new problems which attract the attention of both experimentalists and theorists working in the field of physics of multiphoton processes in atoms and molecules.
Download or read book Scaled Strong Field Interactions at Long Wavelengths written by Emily Frances Sistrunk and published by . This book was released on 2011 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The strong field regime describes interactions between light and matter where the electric field of the laser is a significant fraction of the binding field of the atom. Short pulsed lasers are capable of producing local fields on the order of the atomic unit of electric field. Under the influence of such strong fields, the ionization regime and electron dynamics are highly dependent on the wavelength used to drive the interaction. Few studies have been performed in the mid-infrared (MIR) spectral range. Using MIR wavelengths, the ponderomotive energy, Up, imposed on the electrons is a factor of 20 greater than in the visible and near-infrared. Experiments on above threshold ionization (ATI) of cesium, nonsequential ionization (NSI) of noble gases, and high harmonic generation (HHG) in condensed phase media highlight the benefits of performing strong field investigations in the MIR. The photoelectron energy spectrum from ATI of atoms provides details about the strong field interaction. Cesium atoms driven by a 3.6 um laser indicate that excited states can play a large role in ionization from the ground state. Previous experiments on argon in the near-infrared can be compared to cesium at 3.6 um due to their similar Keldysh-scaling. The ground state of cesium experiences a large Stark shift, unlike similar experiments in argon. The low-lying 6P excited states of cesium produce a strong effect on the photoelectron energy spectrum, resulting in a splitting of each ATI peak. Enhancements in the photoelectron energy spectrum similar to those found in argon are observed in cesium. These enhancements are relatively insensitive to ellipticity of the drive laser. To take advantage of the large ponderomotive energy associated with Mid-IR lasers, ionization of argon, krypton and xenon is studied at 3.6 um. Electrons ionized by the MIR laser to return to the core with up to ~300eV in energy. Inelastic scattering of returning electrons impinging on their parent ion results in impact ionization, producing up to the 6th charge state in xenon. Scaling the impact ionization cross section by the electron return energy distribution and wavepacket spread yields excellent agreement with the observed ionization ratios. Elastic scattering of the returning electrons provides information about the structure of the parent ion, as the differential cross section can be extracted from the experimental photoelectron angular distribution. HHG in atomic gases occurs with low conversion efficiency. The advantages of a MIR laser system are used to study HHG in liquid and solid samples. The long wavelength makes possible the first demonstration of high order harmonics from the bulk of a crystalline solid. Harmonics generated in liquids appear perturbative in nature, while those generated in a crystal are highly nonperturbative. The high order harmonics yield information about the strong field response of the crystal's band structure. The use of MIR wavelengths allows the observation of new strong field phenomena. As all of the above methods are applicable to molecules as well as atoms, MIR studies have a strong impact on understanding the interaction between light and matter.
Download or read book Laser Interactions with Atoms Solids and Plasmas written by Richard M. More and published by Springer. This book was released on 2013-06-11 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this NATO Advanced Study Institute was to bring together scientists and students working in the field of laser matter interactions in order to review and stimulate developmentoffundamental science with ultra-short pulse lasers. New techniques of pulse compression and colliding-pulse mode-locking have made possible the construction of lasers with pulse lengths in the femtosecond range. Such lasers are now in operation at several research laboratories in Europe and the United States. These laser facilities present a new and exciting research direction with both pure and applied science components. In this ASI the emphasis is on fundamental processes occurring in the interaction of short laser pulses with atoms, molecules, solids, and plasmas. In the case of laser-atom (molecule) interactions, high power lasers provide the first access to extreme high-intensity conditions above 10'8 Watts/em', a new frontier for nonlinear interaction of photons with atoms and molecules. New phenomena observed include multiphoton ionization processes, atomic collisions in the presence of a strong laser field, Coulomb explosion following rapid ionization of a molecule and the production of high harmonics of the laser source. Another important topic reviewed in this ASI is the lasercooling ofatoms.
Download or read book Atoms in Intense Laser Fields written by Mihai Gavrila and published by . This book was released on 1992 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: For graduate students, laser scientists, atomic, molecular and optical physicists, topics include the effects of superintense laser fields on multiphoton ionization and harmonic generation; novel effects with ultrashort, subpicosecond laser pulses; and Rydberg atoms in intense microwave fields.
Download or read book Super Intense Laser Atom Physics IV written by H.G. Muller and published by Springer Science & Business Media. This book was released on 1996-05-31 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atoms in strong radiation fields are interesting objects for study, and the research field that concerns itself with this study is a comparatively young one. For a long period after the ~scovery of the photoelectric effect. it was not possible to generate electro magnetic fields that did more than perturb the atom only slightly, and (first-or~er) perturbation theory could perfectly explain what was going on at those low intensities. The development of the pulsed laser bas changed this state of affairs in a rather dramatic way, and fields can be applied that really have a large, or even dominant influence on atomic structure. In the latter case, w~ speak of super-intense fields. Since the interaction between atoms and electromagnetic waves is characterized by many parameters other than the light intensity, such as frequency, iQnization potential, orbit time, etc., it is actually quite difficult to define what is exactly meant by the term 'super-intense'. Obviously the term does not have an absolute meaning, and intensity should always be viewed in relation to other properties of the system. An atom in a radiation field can thus best be described in terms of various ratios of the quantities involved. The nature of the system sometimes drastically changes if the value of one of these parameters exceeds a certain critical value, and the new regime could be called super-intense with respect to that parameter.
