scholarly journals Orientation-dependent stereo Wigner time delay and electron localization in a small molecule

Science ◽  
2018 ◽  
Vol 360 (6395) ◽  
pp. 1326-1330 ◽  
Author(s):  
J. Vos ◽  
L. Cattaneo ◽  
S. Patchkovskii ◽  
T. Zimmermann ◽  
C. Cirelli ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Time Delay ◽  
Theoretical Calculations ◽  
Photoelectric Effect ◽  
Excited Electron ◽  
Electron Localization ◽  
Electron Wave ◽  
Time Resolved ◽  
Electron Wave Packet ◽  
Molecular Potential

Attosecond metrology of atoms has accessed the time scale of the most fundamental processes in quantum mechanics. Transferring the time-resolved photoelectric effect from atoms to molecules considerably increases experimental and theoretical challenges. Here we show that orientation- and energy-resolved measurements characterize the molecular stereo Wigner time delay. This observable provides direct information on the localization of the excited electron wave packet within the molecular potential. Furthermore, we demonstrate that photoelectrons resulting from the dissociative ionization process of the CO molecule are preferentially emitted from the carbon end for dissociative 2Σ states and from the center and oxygen end for the 2Π states of the molecular ion. Supported by comprehensive theoretical calculations, this work constitutes a complete spatially and temporally resolved reconstruction of the molecular photoelectric effect.

scholarly journals Orientation-dependent stereo Wigner time delay and electron localization in a small molecule

2019 ◽  
Vol 205 ◽  
pp. 06008
Author(s):  
Jannie Vos ◽  
Laura Cattaneo ◽  
Serguei Patchkovskii ◽  
Tomas Zimmermann ◽  
Claudio Cirelli ◽  
...  
Keyword(s):  
Time Delay ◽  
Small Molecule ◽  
Time Delays ◽  
Theoretical Calculations ◽  
Photoelectric Effect ◽  
Electron Localization

We present orientation-dependent stereo Wigner time delays of CO molecules, which reveal the electron localization at the ionization moment. Together with theoretical calculations this constitutes a spatially-and temporally-resolved reconstruction of the molecular photoelectric effect.

Time-resolved single-electron wave-packet detection

2016 ◽  
Vol 254 (3) ◽  
pp. 1600547 ◽  
Author(s):  
Masaya Kataoka ◽  
Jonathan D. Fletcher ◽  
Nathan Johnson
Keyword(s):  
Wave Packet ◽  
Single Electron ◽  
Electron Wave ◽  
Time Resolved ◽  
Electron Wave Packet ◽  
Packet Detection

Visualization and Manipulation of Molecular Motion in Solid State through Photo-Induced Clusteroluminescence

2019 ◽  
Author(s):  
Haoke Zhang ◽  
Lili Du ◽  
Lin Wang ◽  
Junkai Liu ◽  
Qing Wan ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Excited State ◽  
Solid State ◽  
Light Source ◽  
Molecular Motion ◽  
Molecular Machine ◽  
Conjugated Molecules ◽  
Time Resolved ◽  
Packing Structure ◽  
New Strategy

<p>Building molecular machine has long been a dream of scientists as it is expected to revolutionize many aspects of technology and medicine. Implementing the solid-state molecular motion is the prerequisite for a practical molecular machine. However, few works on solid-state molecular motion have been reported and it is almost impossible to “see” the motion even if it happens. Here the light-driven molecular motion in solid state is discovered in two non-conjugated molecules <i>s</i>-DPE and <i>s</i>-DPE-TM, resulting in the formation of excited-state though-space complex (ESTSC). Meanwhile, the newly formed ESTSC generates an abnormal visible emission which is termed as clusteroluminescence. Notably, the original packing structure can recover from ESTSC when the light source is removed. These processes have been confirmed by time-resolved spectroscopy and quantum mechanics calculation. This work provides a new strategy to manipulate and “see” solid-state molecular motion and gains new insights into the mechanistic picture of clusteroluminescence.<br></p>

scholarly journals Attosecond intra-valence band dynamics and resonant-photoemission delays in W(110)

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Heinrich ◽  
T. Saule ◽  
M. Högner ◽  
Y. Cui ◽  
V. S. Yakovlev ◽  
...  
Keyword(s):  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Electronic Band Structure ◽  
Photoelectric Effect ◽  
Final State ◽  
Electronic Band ◽  
Time Resolved ◽  
Resonant Photoemission ◽  
Pulse Trains ◽  
Electron Correlation Effects

AbstractTime-resolved photoelectron spectroscopy with attosecond precision provides new insights into the photoelectric effect and gives information about the timing of photoemission from different electronic states within the electronic band structure of solids. Electron transport, scattering phenomena and electron-electron correlation effects can be observed on attosecond time scales by timing photoemission from valence band states against that from core states. However, accessing intraband effects was so far particularly challenging due to the simultaneous requirements on energy, momentum and time resolution. Here we report on an experiment utilizing intracavity generated attosecond pulse trains to meet these demands at high flux and high photon energies to measure intraband delays between sp- and d-band states in the valence band photoemission from tungsten and investigate final-state effects in resonant photoemission.

scholarly journals Electron wave packet sampling with laser-generated extreme ultraviolet and terahertz fields

2011 ◽  
Vol 19 (20) ◽  
pp. 18833 ◽  
Author(s):  
Bernd Schütte ◽  
Ulrike Frühling ◽  
Marek Wieland ◽  
Armin Azima ◽  
Markus Drescher
Keyword(s):  
Wave Packet ◽  
Extreme Ultraviolet ◽  
Electron Wave ◽  
Electron Wave Packet ◽  
Packet Sampling ◽  
Terahertz Fields

scholarly journals Unconventional reconciliation path for quantum mechanics and general relativity

2021 ◽  
Author(s):  
Samuel Yuguru
Keyword(s):  
General Relativity ◽  
Quantum Mechanics ◽  
Wave Diffraction ◽  
Extra Dimensions ◽  
Electron Wave ◽  
Present Stage ◽  
Gedanken Experiment ◽  
Proposed Model ◽  
Conventional Methods ◽  
Reconciliation Process

Abstract Physics in general is successfully governed by quantum mechanics at the microscale and principles of relativity at the macroscale. Any attempts to unify them using conventional methods have somewhat remained elusive for nearly a century up to the present stage. Here in this study, a classical gedanken experiment of electron-wave diffraction of a single slit is intuitively examined for its quantized states. A unidirectional monopole field as quanta of the electric field is pictorially conceptualized into 4D space-time. Its application towards quantum mechanics and general relativity in accordance with existing knowledge in physics paves an alternative path towards their reconciliation process. This assumes a multiverse at a hierarchy of scales with gravity localized to a body into space. Principles of special relativity are then sustained along inertia frames of extra dimensions within the proposed model. Such descriptions provide an approximate intuitive tool to examine physics in general from alternative perspectives using conventional methods and this warrants further investigations.

scholarly journals Unconventional reconciliation path for quantum mechanics and general relativity

2020 ◽  
Author(s):  
Samuel Yuguru
Keyword(s):  
General Relativity ◽  
Quantum Mechanics ◽  
Electric Field ◽  
Wave Diffraction ◽  
Electron Wave ◽  
Present Stage ◽  
Alternative Path ◽  
Gedanken Experiment ◽  
Conventional Methods ◽  
Reconciliation Process

Abstract Physics in general is successfully governed by quantum mechanics at the microscale and principles of relativity at the macroscale. Any attempts to unify them using conventional methods have somewhat remained elusive for nearly a century up to the present stage. Here in this study, a classical gedanken experiment of an electron-wave diffraction of a single slit is intuitively examined for its quantized states. A unidirectional monopole field as quanta of the electric field is pictorially conceptualized. Its application towards quantum mechanics and general relativity in consistent with existing knowledge in physics paves an alternative path towards their reconciliation process by assuming a multiverse at a hierarchy of scales. Such an outcome provides an approximate intuitive guide to pursue physics in general from alternative perspectives using conventional methods.

Capturing and Analyzing the Excited-State Structure of a Cu(I) Phenanthroline Complex by Time-Resolved Diffraction and Theoretical Calculations

2009 ◽  
Vol 131 (18) ◽  
pp. 6566-6573 ◽  
Author(s):  
Ivan I. Vorontsov ◽  
Tim Graber ◽  
Andrey Yu. Kovalevsky ◽  
Irina V. Novozhilova ◽  
Milan Gembicky ◽  
...  
Keyword(s):  
Excited State ◽  
Theoretical Calculations ◽  
State Structure ◽  
Time Resolved ◽  
Phenanthroline Complex
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