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Author : Emma Simpson
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Attosecond Transient Absorption Spectroscopy in Atomic Species written by Emma Simpson and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yan Cheng
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (959 download)
Download or read book Attosecond Transient Absorption Spectroscopy of Atoms and Molecules written by Yan Cheng and published by . This book was released on 2015 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most fundamental goals of attosecond science is to observe and to control the dynamic evolutions of electrons in matter. The attosecond transient absorption spectroscopy is a powerful tool to utilize attosecond pulse to measure electron dynamics in quantum systems directly. In this work, isolated single attosecond pulses are used to probe electron dynamics in atoms and to study dynamics in hydrogen molecules using the attosecond transient absorption spectroscopy technique. The target atom/molecule is first pumped to excited states and then probed by a subsequent attosecond extreme ultraviolet (XUV) pulse or by a near infrared (NIR) laser pulse. By measuring the absorbed attosecond XUV pulse spectrum, the ultrafast electron correlation dynamics can be studied in real time. The quantum processes that can be studied using the attosecond transient absorption spectroscopy include the AC stark shift, multi-photon absorption, intermediate states of atoms, autoionizing states, and transitions of vibrational states in molecules. In all experiments, the absorption changes as a function of the time delay between the attosecond XUV probe pulse and the dressing NIR laser pulse, on a time scale of sub-cycle laser period, which reveals attosecond electron dynamics. These experiments demonstrate that the attosecond transient absorption spectroscopy can be performed to study and control electronic and nuclear dynamics in quantum systems with high temporal and spectral resolution, and it opens door for the study of electron dynamics in large molecules and other more complex systems.
Author : Marie Justine Bell
Publisher :
ISBN 13 :
Total Pages : 230 pages
Book Rating : 4.:/5 (858 download)
Download or read book Transient Absorption Spectroscopy with Isolated Attosecond Pulses written by Marie Justine Bell and published by . This book was released on 2013 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrashort pulses with durations less than one femtosecond advance understanding of chemistry and physics by facilitating time-resolved measurements on the timescale of electronic motion. A very pragmatic type of experiment incorporating isolated attosecond (10 & minus18 s) pulses is transient absorption measurements that utilize the broad bandwidth of attosecond pulses. In these measurements the dispersed spectrum of the isolated attosecond pulse is recorded after the attosecond pulse and a time-delayed optical pulse pass through an experimental target of interest. This thesis focuses on the development of an attosecond transient absorption spectrometer with the ultimate goal of using the spectrometer to measure atomic and molecular dynamics. Two experimental studies are presented: one focusing on the behavior of helium atoms bathed in a strong near-infrared optical field, and one focusing on measurement of the lifetimes of autoionizing states in xenon. Measurement of the absorption spectrum of atomic helium bathed in a near-infrared (780 nm) field exhibits new features when the attosecond pulse and the optical pulse are overlapped in the gas target. The features near the 1s2p transition at 21.21 eV are identified as intermediates in two-photon transitions to reach nearby s and d helium excited states that are inaccessible via one photon transitions from the 1s2 ground state of He. Initial measurements identified three intermediate states, and further experiments investigated the behavior of the states as the near infrared field intensity is increased. Attosecond time-resolved measurement of ultrashort lifetimes of autoionizing states is also investigated. The 5s5p66p and 5s5p67p autoionizing states of xenon are visible in the extreme-ultraviolet absorption spectrum of Xe as Fano resonances. The Fano resonances are suppressed by a time-delayed near-infrared pulse and recover with a time-constant that is related to the lifetime of the state. The studies here identified key parameters for time-resolved measurements of the autoionization lifetime, including spectral resolution of the attosecond transient absorption spectrometer.
Author : Zenghu Chang
Publisher : CRC Press
ISBN 13 : 9781498736749
Total Pages : pages
Book Rating : 4.7/5 (367 download)
Download or read book Attosecond Transient Absorption Spectroscopy written by Zenghu Chang and published by CRC Press. This book was released on 2026-06-30 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a complete picture of the science and application of attosecond transient absorption spectroscopy (ATAS). It explains how this all-optical technique allows substantial improvements in both the signal-to-noise ratio and the energy resolution when compared with photoelectron experiments. The authors explain why ATAS is so attractive for the study of electron dynamics in photochemical processes, dynamics in field-ionized atoms and bulk solids, as well as narrow-linewidth core-excited and doubly-excited states of atoms.
Author : Adrian Wirth
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (78 download)
Download or read book Attosecond Transient Absorption Spectroscopy written by Adrian Wirth and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marieke Faye Jager
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (12 download)
Download or read book Attosecond Transient Absorption of Solid-State and Phase-Change Materials written by Marieke Faye Jager and published by . This book was released on 2017 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Attosecond science, utilizing short bursts of extreme ultraviolet light, has opened up a fascinating new field of ultafast light-matter interactions, where dynamics in atomic, molecular, and solid state systems can now be followed on the timescale of electron motion. In this dissertation, applications of attosecond pulses toward performing transient absorption spectroscopy experiments on complex electron-correlation-driven processes in material systems are described. In the first chapter, a brief overview of ultrafast spectroscopy, attosecond pulse production, and light-matter interaction in the extreme ultraviolet is provided, which offers the necessary breadth and background for the detailed case study that follows, on the insulator-to-metal phase transition in vanadium dioxide. The origin of the bandgap in vanadium dioxide, which is not predicted to exist under conventional single-particle band theories, has been explained as the result of either electron correlation or structural distortion. The goal of the experiments presented herein is to use transient absorption spectroscopy with attosecond pulses to characterize the timescale of this process and gain a mechanistic understanding of how it occurs. Because vanadium dioxide is heat sensitive, an apparatus had to be specifically tailored to this type of experiments, and it is described in the second chapter. The results and analysis, including extreme ultraviolet static and time-resolved measurements on both the insulating and metallic phases, are described in the third chapter. The second half of this dissertation describes the design and construction of a new vacuum endstation to perform attosecond-pump attosecond-probe measurements, which was constructed and tested at Berkeley and installed at a high power attosecond beamline at the University of Central Florida. Ray tracing simulation and design considerations for the optical layout are described in the fourth chapter, and design of the vacuum endstation, diagnostics, and preliminary experiments and testing can be found in the fifth chapter.
Author : Mikhail Volkov
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (18 download)
Download or read book Attosecond Transient Absorption Spectroscopy of Solids written by Mikhail Volkov and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen J. Hageman
Publisher :
ISBN 13 :
Total Pages : 175 pages
Book Rating : 4.:/5 (131 download)
Download or read book Complex Attosecond Transient-absorption Spectroscopy written by Stephen J. Hageman and published by . This book was released on 2020 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental technique is developed to measure the complex refractive index in a transient-absorption experiment using attosecond pulse trains. This complex attosecond transient-absorption spectroscopy (CATS) method is demonstrated by measuring the dynamic change, induced by an infrared dressing pulse, in the real and imaginary parts of the refractive index of the argon $3s3p^6np$ Fano resonances. Typical attosecond transient-absorption spectroscopy (ATS) measurements only capture the imaginary part of the refractive index, and the real part can only be indirectly calculated. CATS enables a direct measurement of the real part of the refractive index, and this removes the need to rely upon indirect calculations which are only valid if certain assumptions hold true. While CATS is demonstrated in a gas phase experiment, it can also be used for condensed matter experiments in either a transmission or reflection geometry. As a prelude to the demonstration of CATS, an ATS experiment is performed to examine the dynamics of the argon Fano resonances under the influence of a dressing field. This ATS measurement reveals a complicated structure of light-induced states and light-induced attenuation in the intensity and time delay dependence of the absorption spectrum. The theoretical understanding of these features is detailed, and excellent agreement between theoretical and experimental results is demonstrated. Additionally, the optical tool that enables CATS to be performed is detailed theoretically and experimentally. This tool is a diffractive optical element known as a square-wave phase grating (SWPG). The SWPG allows for an input femtosecond IR pulse to be duplicated, and the SWPG can control the relative phase between these duplicates. This relative phase control is demonstrated, and it is used to measure the ground state complex refractive index of silicon and germanium.
Author : Kaoru Yamanouchi
Publisher : Springer
ISBN 13 : 303003786X
Total Pages : 291 pages
Book Rating : 4.0/5 (3 download)
Download or read book Progress in Ultrafast Intense Laser Science XIV written by Kaoru Yamanouchi and published by Springer. This book was released on 2018-12-28 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 14th volume in the PUILS series presents up-to-date reviews of advances in Ultrafast Intense Laser Science, an interdisciplinary research field spanning atomic and molecular physics, molecular science, and optical science, which has been stimulated by the rapid developments in ultrafast laser technologies. Each 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 appeal of the respective subject matter; this is followed by reports on cutting-edge discoveries. This volume covers a broad range of topics from this interdisciplinary field, e.g. atoms and molecules interacting in intense laser fields, laser-induced filamentation, high-order harmonics generation, and high-intensity lasers and their applications.
Author : Jens Herrmann
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (97 download)
Download or read book Attosecond Transient Absorption Spectroscopy: Controlling Extreme Ultraviolet Light-matter Interaction written by Jens Herrmann and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Roberto Marquardt
Publisher : Elsevier
ISBN 13 : 0128172355
Total Pages : 376 pages
Book Rating : 4.1/5 (281 download)
Download or read book Molecular Spectroscopy and Quantum Dynamics written by Roberto Marquardt and published by Elsevier. This book was released on 2020-09-18 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Spectroscopy and Quantum Dynamics, an exciting new work edited by Professors Martin Quack and Roberto Marquardt, contains comprehensive information on the current state-of-the-art experimental and theoretical methods and techniques used to unravel ultra-fast phenomena in atoms, molecules and condensed matter, along with future perspectives on the field. Contains new insights into the quantum dynamics and spectroscopy of electronic and nuclear motion Presents the most recent developments in the detection and interpretation of ultra-fast phenomena Includes a discussion of the importance of these phenomena for the understanding of chemical reaction dynamics and kinetics in relation to molecular spectra and structure
Author : 劉書豪
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (97 download)
Download or read book Nonperturbative Study of Attosecond Transient Absorption Spectra and Low-energy Structure of Above-threshold-ionization Spectra written by 劉書豪 and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew Bo Wen Chew
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (12 download)
Download or read book Attosecond Transient Absorption Spectroscopy in the Water Window written by Andrew Bo Wen Chew and published by . This book was released on 2020 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, an OPCPA system which delivers CEP stable 2 mJ 12-fs pulses centered at 1.7 [micrometer] was used to conduct experiments near the water window. This system was used to study below-threshold harmonics produced in Argon, to perform Attosecond Transient Absorption Spectroscopy (ATAS) of Argon at 249 eV and to develop the semi-infinite gas cell which is a high flux soft x-ray source.
Download or read book Two Attosecond Pulse Transient Absorption Spectroscopy and Extraction of the Instantaneous AC Stark Shift in Helium written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James W. Robinson
Publisher :
ISBN 13 : 9780783708966
Total Pages : 197 pages
Book Rating : 4.7/5 (89 download)
Download or read book Atomic Absorption Spectroscopy written by James W. Robinson and published by . This book was released on 1975 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : L. Ebdon
Publisher :
ISBN 13 : 9780855017149
Total Pages : 138 pages
Book Rating : 4.0/5 (171 download)
Download or read book An Introduction to Atomic Absorption Spectroscopy written by L. Ebdon and published by . This book was released on 1982 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gordon W. F. Drake
Publisher : Springer Nature
ISBN 13 : 3030738930
Total Pages : 1436 pages
Book Rating : 4.0/5 (37 download)
Download or read book Springer Handbook of Atomic, Molecular, and Optical Physics written by Gordon W. F. Drake and published by Springer Nature. This book was released on 2023-02-09 with total page 1436 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprises a comprehensive reference source that unifies the entire fields of atomic molecular and optical (AMO) physics, assembling the principal ideas, techniques and results of the field. 92 chapters written by about 120 authors present the principal ideas, techniques and results of the field, together with a guide to the primary research literature (carefully edited to ensure a uniform coverage and style, with extensive cross-references). Along with a summary of key ideas, techniques, and results, many chapters offer diagrams of apparatus, graphs, and tables of data. From atomic spectroscopy to applications in comets, one finds contributions from over 100 authors, all leaders in their respective disciplines. Substantially updated and expanded since the original 1996 edition, it now contains several entirely new chapters covering current areas of great research interest that barely existed in 1996, such as Bose-Einstein condensation, quantum information, and cosmological variations of the fundamental constants. A fully-searchable CD- ROM version of the contents accompanies the handbook.
