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Title: Multistart spiral electron vortices in ionization by circularly polarized UV pulses

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1261703
Grant/Contract Number:
FG03-96ER14646; NA0001944
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 94; Journal Issue: 1; Related Information: CHORUS Timestamp: 2016-12-23 16:39:07; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Ngoko Djiokap, J. M., Meremianin, A. V., Manakov, N. L., Hu, S. X., Madsen, L. B., and Starace, Anthony F. Multistart spiral electron vortices in ionization by circularly polarized UV pulses. United States: N. p., 2016. Web. doi:10.1103/PhysRevA.94.013408.
Ngoko Djiokap, J. M., Meremianin, A. V., Manakov, N. L., Hu, S. X., Madsen, L. B., & Starace, Anthony F. Multistart spiral electron vortices in ionization by circularly polarized UV pulses. United States. doi:10.1103/PhysRevA.94.013408.
Ngoko Djiokap, J. M., Meremianin, A. V., Manakov, N. L., Hu, S. X., Madsen, L. B., and Starace, Anthony F. 2016. "Multistart spiral electron vortices in ionization by circularly polarized UV pulses". United States. doi:10.1103/PhysRevA.94.013408.
@article{osti_1261703,
title = {Multistart spiral electron vortices in ionization by circularly polarized UV pulses},
author = {Ngoko Djiokap, J. M. and Meremianin, A. V. and Manakov, N. L. and Hu, S. X. and Madsen, L. B. and Starace, Anthony F.},
abstractNote = {},
doi = {10.1103/PhysRevA.94.013408},
journal = {Physical Review A},
number = 1,
volume = 94,
place = {United States},
year = 2016,
month = 7
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevA.94.013408

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • Using the classical ensemble method, we have investigated double ionization (DI) of diatomic molecules driven by circularly polarized laser pulses with different internuclear distances (R). The results show that the DI mechanism changes from sequential double ionization (SDI) to nonsequential double ionization (NSDI) as the internuclear distance increases. In SDI range, the structure of the electron momentum distribution changes seriously as R increases, which indicates the sensitive dependence of the release times of the two electrons on R. For NSDI, because of the circular polarization, the ionization of the second electron is not through the well-known recollision process but throughmore » a process where the first electron ionizes over the inner potential barrier of the molecule, moves directly towards the other nucleus, and kicks out the second electron.« less
  • We report the first observation of ionization of Rydberg atoms by subpicosecond, circularly polarized THz radiation. The field amplitude in these pulses is non-negligible for only one-quarter of an optical cycle. The experiment is performed in the short-pulse regime, where the duration of the ionizing pulse is shorter than the classical Kepler period of the Rydberg electron. We find that the ionization probability for these atoms is remarkably insensitive to the time-varying polarization of the THz field. {copyright} {ital 1997} {ital The American Physical Society}
  • Above-threshold ionization of Kr atoms in an infinite sequence of circularly polarized few-cycle pulses is studied in the frame of a nonperturbative scattering theory. The photoelectron angular distributions (PADs) in various pulse lengths are obtained. Our study shows that the PADs in circularly polarized few-cycle pulses are not isotropic and the photoelectron rates in a pair of two opposite directions are not always equal to each other. This inversion asymmetry is due to a multichannel transition where the different channels are characterized by different combinations of absorbed-photon numbers in the ionization process. The PADs are symmetric about an axis relatedmore » to the carrier-envelope (CE) phase. Our study also shows that the position of the maximal emission is related to the CE phase and the pulse length of the short pulses, which makes it possible to control the motion of the ejected photoelectrons by varying the pulses.« less
  • We have numerically investigated ionization of molecules exposed to circularly polarized (CP) intense few-cycle pulses (FCPs) by solving the three-dimensional time-dependent Schroedinger equation. The resulting photoelectron spectra exhibit an interesting ''plateau'' feature that does not appear for atoms exposed to circularly-polarized laser fields. The origin comes from the intense CP field ionizing a portion of the electron wave packet about one nuclear center and driving it through the other. Moreover, the angular distribution of photoelectrons gives an indication of the carrier-envelope phase of the applied FCP, which implies that steering of photoelectrons in space can be achieved by controlling themore » FCP phase.« less