ORCID Profile
0000-0002-5968-8191
Current Organisations
Institute for Basic Science
,
Gwangju Institute of Science and Technology
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Publisher: American Physical Society (APS)
Date: 29-09-2021
Publisher: American Physical Society (APS)
Date: 28-08-2019
Publisher: Springer Science and Business Media LLC
Date: 02-11-2021
DOI: 10.1038/S41598-021-00818-1
Abstract: We study propagation effects due to the finite speed of light in ionization of extended molecular systems. We present a general quantitative theory of these effects and show under which conditions such effects should appear. The finite speed of light propagation effects are encoded in the non-dipole terms of the time-dependent Shrödinger equation and display themselves in the photoelectron momentum distribution projected on the molecular axis. Our numerical modeling for the $$\\hbox {H}_{2}^{+}$$ H 2 + molecular ion and the $$\\hbox {Ne}_2$$ Ne 2 dimer shows that the finite light propagation time from one atomic center to another can be accurately determined in a table top laser experiment which is much more readily accessible than the ground breaking synchrotron measurement by Grundmann et al. (Science 370:339, 2020).
Publisher: American Physical Society (APS)
Date: 15-04-2020
Publisher: American Physical Society (APS)
Date: 07-04-2023
Publisher: Springer Science and Business Media LLC
Date: 11-10-2022
DOI: 10.1038/S41598-022-21549-X
Abstract: We combine IR pump and XUV probe laser pulses to visualize the Kramers–Henneberger (KH) state of the potassium atom. We demonstrate that ionization of such an atom exhibits some molecular-like features such as low order interference maxima in photoelectron momentum spectra. The locations of these maxima allow to estimate spatial dimensions of the KH atom and can be used for accurate calibration of high intensity laser fields. At the same time, we show that an analogy between the KH atom and a homo-nuclear diatomic molecule cannot be extended too far. In particular, higher order interference maxima are very difficult to observe in the case of the KH state. We attribute this to a particular structure of the KH potential which does not confine electron motion to a well-defined potential well unlike in real diatomic molecules.
Publisher: IOP Publishing
Date: 2020
DOI: 10.1088/1742-6596/1412/9/092003
Abstract: Quantum mechanical description of the relativistic non-dipole effects is of fundamental interest in strong-field physics community, as they may have direct implications on the processes relying on re-collision dynamics. Here, we present a detailed experimental and theoretical study on the relativistic non-dipole effects in strong-field ionisation at moderate intensities. We compare our precise measurements with a truly ab-initio fully relativistic 3D model based on the time-dependent Dirac equation and demonstrate an excellent agreement between experimental results and theoretical predictions.
Location: Korea, Republic of
Location: Korea, Republic of
No related grants have been discovered for Kyung Taec Kim.