Strong Field Atomic Ionization: Origin of High-Energy Structures in Photoelectron Spectra

2003 ◽  
Vol 90 (1) ◽  
Author(s):  
Joseph Wassaf ◽  
Valérie Véniard ◽  
Richard Taïeb ◽  
Alfred Maquet
Keyword(s):  
Strong Field ◽  
High Energy ◽  
Photoelectron Spectra ◽  
Atomic Ionization

FREQUENCY EFFECTS AND CLASSICAL PATHS IN STRONG-FIELD IONIZATION

1995 ◽  
Vol 04 (03) ◽  
pp. 687-700
Author(s):  
H. R. REISS
Keyword(s):  
High Frequency ◽  
Field Experiments ◽  
Strong Field ◽  
Polarized Light ◽  
High Energy ◽  
Frequency Theory ◽  
Photoelectron Spectra ◽  
Energy Conditions ◽  
Circularly Polarized Light ◽  
Wide Range

The ability of the SFA (strong-field approximation) to predict the ionization of atoms at all frequencies is explored at low frequency by comparison with experiment. Excellent agreement is found over a very wide range of high intensities. At high frequency, where no precision strong-field experiments are available, a comparison is made between predictions of the SFA and a high-frequency theory due to Gavrila. Agreement in transition rates is very good. The disagreement in the assignment of energy conditions at high frequencies is explained as a difference in interpretation brought about by the gauge transformation employed by Gavrila. An examination of semiclassical path behavior of a photoelectron after ionization gives insight on the lower limits of intensity for which the SFA is applicable, and makes transparent the meaning of a recently applied Coulomb correction to the SFA for circularly polarized light. A related examination for linearly polarized light gives an effective high energy limit for intense-field photoelectron spectra.

scholarly journals Wavelength-Dependent Features of Photoelectron Spectra from Nanotip Photoemission

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 129
Author(s):  
Xiao-Yuan Wu ◽  
Hao Liang ◽  
Marcelo F. Ciappina ◽  
Liang-You Peng
Keyword(s):  
Strong Field ◽  
Field Enhancement ◽  
Laser Pulses ◽  
High Energy ◽  
Classical Trajectory ◽  
Photoelectron Spectra ◽  
Radius Of Curvature ◽  
High Electron ◽  
Electron Dynamics ◽  
Classical Trajectory Monte Carlo

If a metal nanotip is irradiated with the light of a wavelength much larger than the nanotip’s radius of curvature, optical near-fields become excited. These fields are responsible for distinct strong-field electron dynamics, due to both the field enhancement and spatial localization. By classical trajectory, Monte Carlo (CTMC) simulation, and the integration of the time-dependent Schrödinger equation (TDSE), we find that the photoelectron spectra for nanotip strong-field photoemission, irradiated by mid-infrared laser pulses, present distinctive wavelength-dependent features, especially in the mid- to high-electron energy regions, which are different from the well known ones. By extracting the electron trajectories from the CTMC simulation, we investigate these particular wavelength-dependent features. Our theoretical results contribute to understanding the photoemission and electron dynamics at nanostructures, and pave new pathways for designing high-energy nanometer-sized ultrafast electron sources.

OBSERVATIONAL CONSTRAINTS ON STRONG GRAVITY

2011 ◽  
Vol 20 (14) ◽  
pp. 2755-2760
Author(s):  
CHRIS DONE
Keyword(s):  
Black Hole ◽  
Event Horizon ◽  
Strong Field ◽  
Field Tests ◽  
High Energy ◽  
Observational Constraints ◽  
Tests Of General Relativity ◽  
Strong Gravity ◽  
Accretion Flows ◽  
Spacetime Curvature

Accretion onto a black hole transforms the darkest objects in the universe to the brightest. The high energy radiation emitted from the accretion flow before it disappears forever below the event horizon lights up the regions of strong spacetime curvature close to the black hole, enabling strong field tests of General Relativity. I review the observational constraints on strong gravity from such accretion flows, and show how the data strongly support the existence of such fundamental General Relativistic features of a last stable orbit and the event horizon. However, these successes also imply that gravity does not differ significantly from Einstein's predictions above the event horizon, so any new theory of quantum gravity will be very difficult to test.

scholarly journals Quantitative rescattering theory for laser-induced high-energy plateau photoelectron spectra

2009 ◽  
Vol 79 (3) ◽  
Author(s):  
Zhangjin Chen ◽  
Anh-Thu Le ◽  
Toru Morishita ◽  
C. D. Lin
Keyword(s):  
High Energy ◽  
Photoelectron Spectra

scholarly journals Focusing of intense laser pulse by a hollow cone

2010 ◽  
Vol 28 (2) ◽  
pp. 293-298 ◽  
Author(s):  
Wei Yu ◽  
Lihua Cao ◽  
M.Y. Yu ◽  
A.L. Lei ◽  
Z.M. Sheng ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Strong Field ◽  
High Energy ◽  
Plasma Boundary ◽  
High Energy Density ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Hollow Cone ◽  
Conical Channel ◽  
Boundary Plasma

AbstractIt is shown that an intense laser pulse can be focused by a conical channel. This anomalous light focusing can be attributed to a hitherto ignored effect in nonlinear optics, namely that the boundary response depends on the light intensity: the inner cone surface is ionized and the laser pulse is in turn modified by the resulting boundary plasma. The interaction creates a new self-consistently evolving light-plasma boundary, which greatly reduces reflection and enhances forward propagation of the light pulse. The hollow cone can thus be used for attaining extremely high light intensities for applications in strong-field and high energy-density physics and other areas.

scholarly journals High-energy direct photoelectron spectroscopy in strong-field ionization

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
Pei-Lun He ◽  
Michael Klaiber ◽  
Karen Z. Hatsagortsyan ◽  
Christoph H. Keitel
Keyword(s):  
Photoelectron Spectroscopy ◽  
Strong Field ◽  
High Energy ◽  
Field Ionization ◽  
Strong Field Ionization

Coulomb potential effects in strong-field atomic ionization under elliptical polarization

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
RenPing Sun ◽  
XuanYang Lai ◽  
Wei Quan ◽  
ShaoGang Yu ◽  
YanLan Wang ◽  
...  
Keyword(s):  
Coulomb Potential ◽  
Strong Field ◽  
Elliptical Polarization ◽  
Atomic Ionization

scholarly journals High-energy ultrafast mid-IR optical parametric amplifier for strong-field science

2020 ◽  
Vol 1412 ◽  
pp. 082009
Author(s):  
D Faccialà ◽  
M Musheghyan ◽  
P Prasannan Geetha ◽  
A Pusala ◽  
G Crippa ◽  
...  
Keyword(s):  
Strong Field ◽  
High Energy ◽  
Parametric Amplifier ◽  
Optical Parametric Amplifier ◽  
Field Science ◽  
Optical Parametric
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