Manipulating Twisted Electrons in Strong-Field Ionization
- URL: http://arxiv.org/abs/2010.08355v1
- Date: Fri, 16 Oct 2020 12:45:38 GMT
- Title: Manipulating Twisted Electrons in Strong-Field Ionization
- Authors: A. S. Maxwell, G. S. J. Armstrong, M. F. Ciappina, E. Pisanty, Y.
Kang, A. C. Brown, M. Lewenstein, and C. Figueira de Morisson Faria
- Abstract summary: orbital angular momentum (OAM) of photoelectrons freed in strongfield ionization.
We use these twisted' electrons to provide an alternative interpretation on existing experimental work of vortex interferences caused by strong field ionization.
A discussion is included on measuring the OAM in strong field ionization directly or by employing specific laser pulse schemes as well as utilizing the OAM in time-resolved imaging of photo-induced dynamics.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the discrete orbital angular momentum (OAM) of photoelectrons
freed in strongfield ionization. We use these `twisted' electrons to provide an
alternative interpretation on existing experimental work of vortex
interferences caused by strong field ionization mediated by two counterrotating
circularly polarized pulses separated by a delay. Using the strong field
approximation, we derive an interference condition for the vortices. In
computations for a neon target we find very good agreement of the vortex
condition with photoelectron momentum distributions computed with the strong
field approximation, as well as with the time-dependent methods Qprop and
R-Matrix. For each of these approaches we examine the OAM of the
photoelectrons, finding a small number of vortex states localized in separate
energy regions. We demonstrate that the vortices arise from the interference of
pairs of twisted electron states. The OAM of each twisted electron state can be
directly related to the number of arms of the spiral in that region. We gain
further understanding by recreating the vortices with pairs of twisted
electrons and use this to determine a semiclassical relation for the OAM. A
discussion is included on measuring the OAM in strong field ionization directly
or by employing specific laser pulse schemes as well as utilizing the OAM in
time-resolved imaging of photo-induced dynamics.
Related papers
- Quantum pathways interference in laser-induced electron diffraction revealed by a semiclassical method [0.0]
We develop a novel method for strong-laser-field physics based on the combination of the semiclassical Herman-Kluk propagator and the strong-field approximation.
Our results can be used to extend current capabilities of the laser-induced electron diffraction and other ultrafast imaging and strong-field spectroscopic techniques.
arXiv Detail & Related papers (2024-08-22T20:23:37Z) - Dipole-dipole interactions mediated by a photonic flat band [44.99833362998488]
We study the photon-dipole interactions between emitters dispersively coupled to the photonic analogue of a flat band (FB)
We show that the strength of such photon-mediated interactions decays exponentially with distance with a characteristic localization length.
We find that the localization length grows with the overlap between CLSs according to an analytically-derived universal scaling law valid for a large class of FBs both in 1D and 2D.
arXiv Detail & Related papers (2024-05-30T18:00:05Z) - Single site-controlled inverted pyramidal InGaAs QD-nanocavity operating
at the onset of the strong coupling regime [15.529347711119406]
Single site-controlled inverted pyramidal InGaAs QD at the antinode of a GaAs photonic crystal cavity offers great promise for practical on-chip photonic quantum information processing.
Here, we reveal the onset of phonon-mediated coherent exciton-photon interaction on our tailored single site-controlled InGaAs QD.
arXiv Detail & Related papers (2023-04-21T21:29:17Z) - Photoinduced prethermal order parameter dynamics in the two-dimensional
large-$N$ Hubbard-Heisenberg model [77.34726150561087]
We study the microscopic dynamics of competing ordered phases in a two-dimensional correlated electron model.
We simulate the light-induced transition between two competing phases.
arXiv Detail & Related papers (2022-05-13T13:13:31Z) - Sub-cycle time-resolved nondipole dynamics in tunneling ionization [0.0]
The electron nondipole dynamics in tunneling ionization in an elliptically polarized laser field is investigated theoretically.
We calculate attoclock angle-resolved light-front momentum distributions at different ellipticities of the laser field in quasistatic and nonadiabatic regimes.
The nondipole correlations between longitudinal and transverse momentum components are examined.
arXiv Detail & Related papers (2022-02-10T20:17:47Z) - Tunneling ionization in ultrashort laser pulses: edge-effect and remedy [0.0]
Tunneling ionization of an atom in ultrashort laser pulses is considered.
Photoelectron momentum distribution (PMD) shows an edge-effect because of the photoelectron diffraction by the time-slit of the pulse.
arXiv Detail & Related papers (2022-01-19T13:23:01Z) - Photon-mediated interactions near a Dirac photonic crystal slab [68.8204255655161]
We develop a theory of dipole radiation near photonic Dirac points in realistic structures.
We find positions where the nature of the collective interactions change from being coherent to dissipative ones.
Our results significantly improve the knowledge of Dirac light-matter interfaces.
arXiv Detail & Related papers (2021-07-01T14:21:49Z) - Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators.
We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure.
The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
arXiv Detail & Related papers (2021-05-27T18:00:02Z) - Continuum-electron interferometry for enhancement of photoelectron
circular dichroism and measurement of bound, free, and mixed contributions to
chiral response [39.58317527488534]
We develop photoelectron interferometry based on laser-assisted extreme ultraviolet ionization for flexible and robust control of photoelectron circular dichroism in randomly oriented chiral molecules.
A comb of XUV photons ionizes a sample of chiral molecules in the presence of a time-delayed infrared or visible laser pulse promoting interferences between components of the XUV-ionized photoelectron wave packet.
arXiv Detail & Related papers (2021-04-15T15:20:57Z) - Conservation laws for Electron Vortices in Strong-Field Ionisation [0.0]
We investigate twisted electrons with a well defined orbital angular momentum, which have been ionised via a strong laser field.
We derive conservation laws for the angular momenta of twisted electrons in the cases of linear and circularly polarised fields.
This work provides the basic theoretical framework with which to understand the orbital angular momentum of a photoelectron undergoing strong field ionisation.
arXiv Detail & Related papers (2021-02-15T11:03:45Z) - Photoionization of aligned excited states in neon by attosecond laser
pulses [0.0]
We numerically describe the ionization process induced by linearly and circularly polarized XUV attosecond laser pulses on an aligned target.
We find that correlation-assisted ionization channels can dominate over channels without correlation.
arXiv Detail & Related papers (2020-11-11T09:36:09Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.