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Some Advancement In Ionization Of Atoms And Molecules In Intermediate Intensity Regime Using Ultra Fast Laser Pulses
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Book Synopsis SOME ADVANCEMENT IN IONIZATION OF ATOMS AND MOLECULES IN INTERMEDIATE INTENSITY REGIME USING ULTRA-FAST LASER PULSES. by : Seyed Mehdi Sharifi Kalahroudi
Download or read book SOME ADVANCEMENT IN IONIZATION OF ATOMS AND MOLECULES IN INTERMEDIATE INTENSITY REGIME USING ULTRA-FAST LASER PULSES. written by Seyed Mehdi Sharifi Kalahroudi and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress in Ultrafast Intense Laser Science by : Antonio Giulietti
Download or read book Progress in Ultrafast Intense Laser Science written by Antonio Giulietti and published by Springer Science & Business Media. This book was released on 2010-05-21 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers a range of topics from this interdisciplinary field, focusing on coherent responses of gaseous and condensed matter to ultrashort intense laser pulses, propagation of intense laser pulses, and laser-plasma interaction and its applications.
Book Synopsis Controlling/Probing Atoms and Molecules with Ultrafast Laser Pulses by : Corneliu Manescu
Download or read book Controlling/Probing Atoms and Molecules with Ultrafast Laser Pulses written by Corneliu Manescu and published by LAP Lambert Academic Publishing. This book was released on 2009-09 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in the ultrashort laser technology have spawned a series of new directions of research in atomic and molecular physics. This work compounds two studies on the control and probing of atomic matter by ultrafast laser pulses. The first study is concerned with the control of quantum wavepackets focusing by chirped, ultrashort laser pulses. The ability to control wavepacket focusing is important for the achievement of specific excitation pathways, for controlling chemical reactivity or even molecular synthesis. In this work, we present a general method for wavepacket control in the weak field limit. Numerical simulations involving the ICN molecule confirm our theoretical framework. The second study refers to the ionization of sodium Rydberg states via half-cycle pulses (HCPs). For this process, our full quantum-mechanical calculations demonstrate an asymmetry in both ionization rates and ionization spectrum between the downhill (Stark red-shifted) and uphill (Stark blue- shifted) states. The asymmetry is explained by appealing to a semi-classical model of the interfering ionization pathways.
Book Synopsis Progress in Ultrafast Intense Laser Science XVI by : Kaoru Yamanouchi
Download or read book Progress in Ultrafast Intense Laser Science XVI written by Kaoru Yamanouchi and published by Springer Nature. This book was released on 2021-07-30 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers a broad range of topics from the interdisciplinary research field of ultrafast intense laser science, focusing on atoms and molecules interacting with intense laser fields, laser-induced filamentation, high-order harmonics generation, and high power lasers and their applications. This sixteenth volume features contributions from world-renowned researchers, introducing the latest reports on probing molecular chirality with intense laser fields, and the most recent developments in the Shanghai Superintense Ultrafast Laser Facility project. The PUILS series delivers up-to-date reviews of progress in this emerging interdisciplinary research field, spanning atomic and molecular physics, molecular science, and optical science, which has been stimulated by the recent developments in ultrafast laser technologies. Each volume compiles peer-reviewed articles authored by researchers at the forefront of each of their own subfields of ultrafast intense laser science. Every chapter opens with an overview of the topics to be discussed, so that researchers unfamiliar to the subfield, especially graduate students, can grasp the importance and attractions of the research topic at hand; these are followed by reports of cutting-edge discoveries.
Book Synopsis Progress in Ultrafast Intense Laser Science I by : See Leang Chin
Download or read book Progress in Ultrafast Intense Laser Science I written by See Leang Chin and published by Springer Science & Business Media. This book was released on 2006-10-03 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first of a series of books on Ultrafast Intense Laser Science, a newly emerging interdisciplinary research field that spans atomic and molecular physics, molecular science, and optical science. It covers intense VUV laser-cluster interaction, resonance and chaos-assisted tunneling, and the effects of the carrier-envelope phase on high-order harmonic generation.
Book Synopsis Atomic and Molecular Processes with Short Intense Laser Pulses by : Andre D. Bandruk
Download or read book Atomic and Molecular Processes with Short Intense Laser Pulses written by Andre D. Bandruk and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the lectures and communications presented at the NATO Advanced Research Workshop on "Atomic and Molecular Processes with Short Intense Laser Pulses" (NATO ARW 848/86). The workshop was held at Bishop's University, Lennoxville, Que, Canada, July 19-24, 1987, under the directorship of Prof. A.D. Bandrauk, Universite de Sherbrooke. A scientific committee made up of Dr. P. Corkum (Laser Physics, ~ational Research Council of Canada), Dr. P. Hackett (Laser Chemistry, National Research Council of Canada), Prof. S.C. Wallace (Dept. of Chemistry and Physics, University of Toronto), and Prof. F.H.M. Faisal (FakultHt fUr Physik, UniversitHt Bellefeld) was called upon to invite and organize eminent lectures in the fields of i) Coherence Phenomena in Atomic and Molecular Photoprocesses. ii) High Intensity Atomic and Molecular Phenomena. iii) Laser Chemistry The aim of the workshop was to bring together chemists and physicists in order to~iscuss and analyze the progress made in the use of short in tense laser pulses in understanding coherence phenomena and high intensity, nonlin~adiative effects in atomic and molecular systems.
Book Synopsis Ionization and Dissociation Dynamics of Molecules in Strong Laser Fields by : Wei Lai
Download or read book Ionization and Dissociation Dynamics of Molecules in Strong Laser Fields written by Wei Lai and published by . This book was released on 2016 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The fast advancement of ultrashort-pulsed high-intensity laser technology allows for generating an electric field equivalent to the Coulomb field inside an atom or a molecule (e.g., Ec=5.14x109 V/cm at the 1s orbit radius a0=0.0529 nm of the hydrogen atom, which corresponds to an intensity of 3.54x1016 W/cm2). Atoms and molecules exposed in such a field will easily be ionized, as the external field is strong enough to remove the electrons from the core. This is usually referred to "strong field". Strong fields provide a new tool for studying the interaction of atoms and molecules with light in the nonlinear nonperturbative regime. During the past three decades, significant progress has been made in the strong field science. Today, most phenomena involving atoms in strong fields have been relatively well understood by the single-active-electron (SAE) approximation. However, the interpretation of these responses in molecules has encountered great difficulties. Not like atoms that only undergo excitation and ionization, various dissociation channels accompanying excitation and ionization can occur in molecules during the laser pulse interaction, which imparts further complexity to the study of molecules in strong fields. Previous studies have shown that molecules can behave significantly different from rare gas atoms in phenomena as simple as single and double ionization. Molecular dissociation following ionization also presents challenges in strong fields compared to what we have learned in the weak-field regime. This dissertation focuses on experimental studies on ionization and dissociation of some commonly-seen small molecules in strong laser fields. Previous work of molecules in strong fields will be briefly reviewed, particularly on some open questions about multiple dissociation channels, nonsequential double ionization, enhanced ionization and molecular alignment. The identification of various molecular dissociation channels by recent experimental technical upgrades will be shown. The study of enhanced ionization in small molecules by time-resolved pump-probe experiments and varying-pulse duration experiments will be discussed, followed by an investigation of molecular alignment effect in sequential and nonsequential dynamics. At last, selective charge separation in charge asymmetric dissociation of heteronuclear diatomic molecules will be shown and conclusion and future work will be discussed."--Pages vii-viii.
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 Progress in Ultrafast Intense Laser Science by : Andreas Becker
Download or read book Progress in Ultrafast Intense Laser Science written by Andreas Becker and published by Springer. This book was released on 2008-12-08 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a great pleasure that we are now publishing the fourth volume of the series on PUILS, through which we have been introducing the progress in ultrafast intense laser science, the frontiers of which are rapidly expanding, thanks to the progress in ultrashort and high-power laser technologies. The interdisciplinary nature of this research ?eld is attracting researchers with di?erent expertise and backgrounds. As in the previousvolumeson PUILS, each chapter in the presentvolume, which is in the range of 15–25 pages, begins with an introduction in which a clear and concise account of the signi?cance of the topic is given, followed by a description of the authors’ most recent research results. All the chapters are peer-reviewed. The articles of this fourth volume cover a diverse range of the interdisciplinary research ?eld, and the topics may be grouped into four categories: strong ?eld ionization of atoms (Chaps. 1–2), excitation, ioni- tion and fragmentation of molecules (Chaps. 3–5), nonlinear intense optical phenomena and attosecond pulses (Chaps. 6–8), and laser solid interactions and photoemissions (Chaps. 9–11).
Book Synopsis Progress in Ultrafast Intense Laser Science VII by : Kaoru Yamanouchi
Download or read book Progress in Ultrafast Intense Laser Science VII written by Kaoru Yamanouchi and published by Springer Science & Business Media. This book was released on 2011-05-07 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PUILS series delivers up-to-date reviews of progress in Ultrafast Intense Laser Science, a newly emerging interdisciplinary research field spanning atomic and molecular physics, molecular science, and optical science, which has been stimulated by the recent developments in ultrafast laser technologies. Each volume compiles peer-reviewed chapters authored by researchers at the forefront of each their own subfields of UILS. Every chapter begins with an overview of the topics to be discussed, so that researchers unfamiliar to the subfield, as well as graduate students, can grasp the importance and attractions of the research topic at hand; these are followed by reports of cutting-edge discoveries. This seventh volume covers a broad range of topics from this interdisciplinary research field, focusing on the ionization of atoms and molecules, ultrafast responses of protons and electrons within a molecule, molecular alignment, high-order harmonics and attosecond pulse generation, and acceleration of electrons and ions in laser plasmas.
Book Synopsis Ionization Dynamics of Atoms and Molecules Subject to Intense Laser Pulses from Femtoseconds to Attoseconds by : Cong-Zhang Gao
Download or read book Ionization Dynamics of Atoms and Molecules Subject to Intense Laser Pulses from Femtoseconds to Attoseconds written by Cong-Zhang Gao and published by . This book was released on 2016 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation of ionization dynamics of atoms and molecules illuminated with intense laser fields has attracted a great of interest in many disciplines over the decades. In this context, experiments of laser-matter interaction on the exploration of underlying mechanisms are considerably expanding with the advent of ultrashort femtosecond and attosecond laser pulses. However, the description of the laser irradiation process from a theoretical perspective is still a challenge, in particular for complex systems, such as the fullerene C60. To that end, we turn to exploit a fully fledged approach "Time-Dependent Density-Functional Theory (TDDFT)" to describe electron emission induced by a broad range of laser pulses from weak to strong and from femtoseconds to attoseconds. The first part of the thesis contributes to the study of ionization dynamics of C60 irradiated by femtosecond laser pulses. Three ionization mechanisms, single-photon ionization, multi-photon ionization, and strong-field ionization, are extensively explored via photoelectron spectra (PES) and photoelectron angular distribution (PAD). Our analysis shows that for single-photon ionization, the PES basically reveal the occupied single-particle states which can be associated with the orbital depletion, and the PAD can be generalized into the anisotropy parameter which sensitively depends on the electronic states instead of the photon frequency. For multi-photon ionization, the PES are mostly generated by few uppermost orbitals, and the PAD reveal larger anisotropy with the increase of photon order. For strong-field ionization, the PES are featured by an extended plateau at high energies due to electron recollisions, and the delicate pattern on the plateau is analyzed by using a three-step model. The PAD of the high-energy electrons shows a strong alignment along the laser polarization, which is promising to generate a highly collimated electron beam. Moreover, we also discuss temperature effects from ionic motion on the PES and PAD. The second part of the work focuses on the ionization dynamics of simple atoms and molecules subject to extreme ultraviolet (XUV) attosecond pulses in the presence of an infrared (IR) field. Using similar laser parameters as experiments, we find that for He atom it leads to subcycle ionization on the attosecond time scale depending on the delay time between IR and XUV pulses, while for Ar atom this is absent. To better understand it, we make a systematic study on the effect of key laser parameters in the IR regime. Our results reveal that IR laser intensity and XUV frequency are decisive parameters. We further study resonance effects on electron emission in Na2 molecule, and we find that ionization pattern can be related to either IR laser frequency or the eigenfrequency of the system. We then extend it to the mid-IR (MIR) regime, where more complex ionization patterns are observed. Finally, we develop a schematic model accounting for electron emission in two-color laser field, and an analytical solution of ionization probability is also obtained, which well explains the main characteristics of the ionization pattern.
Book Synopsis Fragmentation of Molecular Ions in Ultrafast Laser Pulses by : Utuq Ablikim
Download or read book Fragmentation of Molecular Ions in Ultrafast Laser Pulses written by Utuq Ablikim and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Imaging the interaction of molecular ion beams with ultrafast intense laser fields is a very powerful method to understand the fragmentation dynamics of molecules. Femtosecond laser pulses with different wavelengths and intensities are applied to dissociate and ionize molecular ions, and each resulting fragmentation channel can be studied separately by implementing a coincidence three-dimensional (3D) momentum imaging method. The work presented in this master's report can be separated into two parts. First, the interaction between molecular ion beams and femtosecond laser pulses, in particular, the dissociation of CO into C+O, is studied. For that purpose, measurements are conducted at different laser intensities and wavelengths to investigate the possible pathways of dissociation into C+O. The study reveals that CO+ starts to dissociate from the quartet electronic state at low laser intensities. Higher laser intensity measurements, in which a larger number of photons can be absorbed by the molecule, show that the doublet electronic states with deeper potential wells, e.g. A2[pi], contribute to the dissociation of the molecule. In addition, the three-body fragmentation of CO2+ into C++O++O+ is studied, and two breakup scenarios are separated using the angle between the sum and difference of the momentum vectors of two O+ fragments. In the second part, improvements in experimental techniques are discussed. Development of a reflective telescope setup intended to increase the conversion efficiency of ultraviolet (UV) laser pulse generation is described, and the setup is used in the studies of CO+ dissociation described in this report. The other technical study presented here is the measurement of the position dependence of timing signals picked off of a microchannel plate (MCP) surface. The experimental method is presented and significant time spread over the surface of the MCP detector is reported [1].
Book Synopsis Controlling the Quantum World by : National Research Council
Download or read book Controlling the Quantum World written by National Research Council and published by National Academies Press. This book was released on 2007-06-21 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the Physics 2010 decadal survey project, the Department of Energy and the National Science Foundation requested that the National Research Council assess the opportunities, over roughly the next decade, in atomic, molecular, and optical (AMO) science and technology. In particular, the National Research Council was asked to cover the state of AMO science, emphasizing recent accomplishments and identifying new and compelling scientific questions. Controlling the Quantum World, discusses both the roles and challenges for AMO science in instrumentation; scientific research near absolute zero; development of extremely intense x-ray and laser sources; exploration and control of molecular processes; photonics at the nanoscale level; and development of quantum information technology. This book also offers an assessment of and recommendations about critical issues concerning maintaining U.S. leadership in AMO science and technology.
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. This book was released on 2010-11-25 with total page 0 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 Progress in Ultrafast Intense Laser Science II by : See Leang Chin
Download or read book Progress in Ultrafast Intense Laser Science II written by See Leang Chin and published by Springer Science & Business Media. This book was released on 2007-06-10 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book series addresses a newly emerging interdisciplinary research field, Ultrafast Intense Laser Science, spanning atomic and molecular physics, molecular science, and optical science. Highlights of this second volume include Coulomb explosion and fragmentation of molecules, control of chemical dynamics, high-order harmonic generation, propagation and filamentation, and laser-plasma interaction. All chapters are authored by foremost experts in their fields.
Book Synopsis Lectures on Ultrafast Intense Laser Science 1 by : Kaoru Yamanouchi
Download or read book Lectures on Ultrafast Intense Laser Science 1 written by Kaoru Yamanouchi and published by Springer Science & Business Media. This book was released on 2010-12-17 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features tutorial-like chapters on ultrafast intense laser science by world-leading scientists who are active in the rapidly developing interdisciplinary research field. It is written to give a comprehensive survey of all the essential aspects of ultrafast intense laser science. The volume covers theories of atoms and molecules in intense laser fields, high intensity physics scaled to long wavelength, pulse shaping techniques, non-linear optics in the XUV region, ultrafast X-ray spectroscopy, quantum emission and applications, filamentation, and ultraintense-laser matter interaction.
Book Synopsis Advances in Atomic, Molecular, and Optical Physics by :
Download or read book Advances in Atomic, Molecular, and Optical Physics written by and published by Elsevier. This book was released on 1999-10-06 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series, established in 1965, is concerned with recent developments in the general area of atomic, molecular, and optical physics. The field is in a state of rapid growth, as new experimental and theoretical techniques are used on many old and new problems. Topics covered also include related applied areas, such as atmospheric science, astrophysics, surface physics, and laser physics.
