Photoionization microscopy for a hydrogen atom in parallel electric and magnetic fields

Abstract

In photoionization microscopy experiments, an atom is placed in static external fields, it is ionized by a laser, and the electron falls onto a position-sensitive detector. The current of electrons arriving at various points on the detector depends upon the initial state of the atom, upon the excited states to which the electron is resonantly or non-resonantly excited, and upon the various paths leading from the atom to the final point on the detector. We report here the first quantum-mechanical computations of photoionization microscopy in parallel electric and magnetic fields. We focus especially on the patterns resulting from resonant excited states. We show that the magnetic field substantially modifies some of these resonant states, confining them in the radial direction, and that it has a strong effect on the interference pattern at the detector.

Time domain study on the tunneling dynamics in photoionization microscopy

“…For this purpose, the evolution of the energy level as a function of the magnetic field intensity is shown in figure 5. We reproduced the level anti-crossing between Stark states (1, 28, 0) and (2, 26, 0) in [24]. The energy levels in this energy range are densely distributed.…”

“…Wang et al extend the photoionization microscopy to atoms in a pure magnetic field [20] and generalized van der Waals potential [21]. Liu studies the photoionization microscopy for a hydrogen atom near a metal surface [22] and in parallel electric and magnetic fields [23,24] with a semi-classical method and wave-packet propagation method, where new types of interference patterns are identified and deciphered.…”

The Quantum Biology of Politics

“…The audio composition is produced from the datasonification of edited layers of the original 2D image. The image that starts the processes was produced in a photoionization microscopy experiment (Deng, et al, 2016) in which an atom placed in static external fields is ionized by a laser and so an electron falls onto a position-sensitive detector.…”

Analysis of the fractal intrinsic quality in the ionization of Rydberg helium and lithium atoms

“…[14][15][16][17][18] With the advancement of laser technology and semiclassical theory, considerable attention has been paid to photoionization microscopy and the ionization dynamics of atoms in external fields. [2,6,7,[19][20][21][22][23][24][25] The chaotic ionization of hydrogen in electric and magnetic fields is described by the Poincaré map. [26][27][28][29] Recently, with the development of chaos and fractal theory in physics, consideration has been given to fractal dynamics in many fields, for example, the fractal dynamics in quantum and semiclassical transport.…”