Ultrafast Studies Of Electron Dynamics At Metal Dielectric Interfaces
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Ultrafast Studies Of Electron Dynamics At Metal Dielectric Interfaces
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Author : Nien-Hui Ge
language : en
Publisher:
Release Date : 1998
Ultrafast Studies Of Electron Dynamics At Metal Dielectric Interfaces written by Nien-Hui Ge and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Ultrafast Electron Dynamics At Dielectric Metal Interfaces
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Author : Sean Alexander Garrett-Roe
language : en
Publisher:
Release Date : 2005
Ultrafast Electron Dynamics At Dielectric Metal Interfaces written by Sean Alexander Garrett-Roe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Ultrafast Studies Of Electron Dynamics At Metal Dielectric Interfaces
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Author :
language : en
Publisher:
Release Date : 1998
Ultrafast Studies Of Electron Dynamics At Metal Dielectric Interfaces written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Femtosecond time- and angle-resolved two-photon photoemission spectroscopy has been used to study fundamental aspects of excited electron dynamics at metal-dielectric interfaces, including layer-by-layer evolution of electronic structure and two-dimensional electron localization. On bare Ag(111), the lifetimes of image states are dominated by their position with respect to the projected bulk band structure. The n = 2 state has a shorter lifetime than the n = 1 state due to degeneracy with the bulk conduction band. As the parallel momentum of the n = 1 image electron increases, the lifetime decreases. With decreasing temperatures, the n = 1 image electrons, with zero or nonzero parallel momentum, all become longer lived. Adsorption of one to three layers of n-heptane results in an approximately exponential increase in lifetime as a function of layer thickness. This results from the formation of a tunneling barrier through which the interfacial electrons must decay, consistent with the repulsive bulk electron affinity of n-alkanes. The lifetimes of the higher quantum states indicate that the presence of the monolayer significantly reduces coupling of the image states to the bulk band structure. These results are compared with predictions of a dielectric continuum model. The study of electron lateral motion shows that optical excitation creates interfacial electrons in quasifree states for motion parallel to the n-heptane/Ag(111) interface. These initially delocalized electrons decay into a localized state within a few hundred femtoseconds. The localized electrons then decay back to the metal by tunneling through the adlayer potential barrier. The localization time depends strongly on the electron's initial parallel momentum and exhibits a non-Arrhenius temperature dependence. The experimental findings are consistent with a 2-D self-trapping process in which electrons become localized by interacting with the topmost plane of the alkane layer. The energy dependence of the self-trapping rate has been modeled with an electron transfer theory. This analysis shows that self-trapping involves inter- and intramolecular vibrational modes of the overlayer and the non-Arrhenius temperature dependence is a result of a strong quantum contribution from the intramolecular modes. These results for a model interface contribute to the fundamental understanding of electron behavior at the interface between metals and molecular solids.
Femtosecond Studies Of Electron Dynamics And Structure At Metal Molecular Interfaces
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Author : André David Miller
language : en
Publisher:
Release Date : 2002
Femtosecond Studies Of Electron Dynamics And Structure At Metal Molecular Interfaces written by André David Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Ultrafast Phenomena Xii
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Author : T. Elsaesser
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Ultrafast Phenomena Xii written by T. Elsaesser and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
This volume is a collection of papers presented at the Twelfth International Conference on Ultrafast Phenomena held at Charleston, SC, from July 9 to 13, 2000. The Ultrafast Phenomena Conferences are held every two years and provide a forum for discussion of the latest results in ultrafast optics and their applications in science and engineering. A total of more than 200 papers was presented, reporting progress in the technology of generating and characterizing ultrashort pulses, including new techniques for shortening the duration of laser pulses, for stabilizing their absolute phase, and for improving tunability over broad wavelength ranges, output powers and peak intensities. Ultrafast spectroscopy, including techniques like time-resolved X-ray diffrac tion and two-dimensional spectroscopy, continues to give new insights into fundamental processes in physics, chemistry and biology. Control and opti mization of the outcome of ultrafast processes represent another important field of research. There is an increasing number of applications of ultrafast techniques, for instance in material diagnostics and processing and in imag ing and microscopy. The enthusiasm of the participants, among them many students, the high quality of the papers and the nice conference site made the conference successful and pleasant.
Ultrafast Phenomena Xi
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Author : Thomas Elsässer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Ultrafast Phenomena Xi written by Thomas Elsässer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
This volume contains papers presented at the Eleventh International Conference on Ultrafast Phenomena held at Garmisch-Partenkirchen, Germany, from July 12 to 17, 1998. The biannual Ultrafast Phenomena Conferences provide a forum for dis cussion of the latest advances in ultrafast optics and their applications in science and engineering. The Garmisch conference brought together a multidisciplinary group of 440 participants from 27 countries, including 127 students. The enthu siasm of this large number of Participants, the high quality of the papers they presented and the magnificent conference site resulted in a successful and pleasant conference. Progress was reported in the technology of generating ultrashort pulses, in cluding new techniques for improving laser-pulse duration, tunability over broad wavelength ranges, output power and peak intensity. Ultrafast spectroscopy con tinues to provide new insight into fundamental processes in physics, chemistry, biology, and engineering. In addition to analyzing ultrafast phenomena, control of ultrafast dynamics now represents an important topic. Ultrafast concepts and tech niques are being applied in imaging and microscopy, high speed optoelectronics, mat~rial diagnostics and processing, reflecting the maturing of the field. Acknowledgements. Many people contributed to the success of the conference.
Ultrafast Phenomena X
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Author : Paul F. Barbara
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Ultrafast Phenomena X written by Paul F. Barbara and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
This volume contains papers presented at the Tenth International Conference on Ultrafast Phenomena held at Del Coronado, California, from May 28 to June 1, 1996. The biannual Ultrafast Phenomena Conferences provide a forum for the discussion of the latest advances in ultrafast optics and their applications in science and engineering. The Ultrafast Phenomena Conference maintains a broad international representation with 391 participants from 18 countries, including 94 students attending the conference. The multidisciplinary character of this meeting provides a cross-fertilization of ultrafast concepts and techniques among various scientific and engineering disciplines. The enthusiasm of the paticipants, the originality and quality of the papers that they presented, and the beautiful conference site combined to produce a very successful and enjoyable meeting. Progress was reported in the technology of generating ultrashort pulses, in cluding new techniques for improving laser-pulse duration, output power, wave length range, and compactness. Ultrafast spectroscopy continues to impact on and expand the knowledge base of fundamental processes in physics, chemistry, biol ogy and engineering. In addition ultrafast phenomena now extends to real-world applications in biology, high-speed communication, and material diagnostics. The Tenth Ultrafast Phenomena Conference was highlighted by a 'special event' in which the developments of the previous conferences were reviewed in a panel discussion by G. Mourou, E. Ippen, A. Migus, A. Laubereau and R. Hochstrasser.
Two Dimensional Electron Solvation By Alcohol Molecules On The Ag 111 Surface
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Author : Simon Hsiang Liu
language : en
Publisher:
Release Date : 2002
Two Dimensional Electron Solvation By Alcohol Molecules On The Ag 111 Surface written by Simon Hsiang Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Current Trends Of Surface Science And Catalysis
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Author : Jeong Young Park
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-10-23
Current Trends Of Surface Science And Catalysis written by Jeong Young Park and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-23 with Science categories.
This unique book covers the latest surface science studies on model catalysts, including single crystals, non-colloidal nanocatalysts, and nanoparticles in various forms with the control of size, shape and composition. This book addresses the issue of bridging “materials and pressure gaps” and also discusses the important issue of metal-oxide interface and hot electron flows in heterogeneous catalysis. The current development of in-situ surface techniques that is relevant to bridging “pressure gaps” is also highlighted.
Two Photon Photoemission Of Organic Semiconductor Molecules On Ag 111
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Author : Aram Yang
language : en
Publisher:
Release Date : 2008
Two Photon Photoemission Of Organic Semiconductor Molecules On Ag 111 written by Aram Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.