Resonant control of photoelectron directionality by interfering one- and two-photon pathways
Abstract
Coherent control of interfering one- and two-photon processes has for decades been the subject of research to achieve the redirection of photocurrent. The present study develops two-pathway coherent control of ground-state helium atom above-threshold photoionization for energies up to the N = 2 threshold, based on a multichannel quantum defect and R-matrix calculation. Three parameters are controlled in our treatment: the optical interference phase ΔΦ, the reduced electric field strength χ = $$\mathscr{E}^2_ω$$$$\mathscr{E}_{2ω}$$, and the final state energy ε. A small energy change near a resonance is shown to flip the emission direction of photoelectrons with high efficiency, through an example where 90% of photoelectrons whose energy is near the 2p21Se resonance flip their emission direction. However, the large fraction of photoelectrons ionized at the intermediate state energy, which are not influenced by the optical control, make this control scheme challenging to realize experimentally.
- Publication Date:
- Research Org.:
- Purdue Univ., West Lafayette, IN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1851402
- Grant/Contract Number:
- SC0010545
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review A
- Additional Journal Information:
- Journal Volume: 103; Journal Issue: 5; Journal ID: ISSN 2469-9926
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; coherent control; multiphoton; tunneling ionization; excitation
Citation Formats
Wang, Yimeng, and Greene, Chris H. Resonant control of photoelectron directionality by interfering one- and two-photon pathways. United States: N. p., 2021.
Web. doi:10.1103/physreva.103.053118.
Wang, Yimeng, & Greene, Chris H. Resonant control of photoelectron directionality by interfering one- and two-photon pathways. United States. https://doi.org/10.1103/physreva.103.053118
Wang, Yimeng, and Greene, Chris H. Mon .
"Resonant control of photoelectron directionality by interfering one- and two-photon pathways". United States. https://doi.org/10.1103/physreva.103.053118. https://www.osti.gov/servlets/purl/1851402.
@article{osti_1851402,
title = {Resonant control of photoelectron directionality by interfering one- and two-photon pathways},
author = {Wang, Yimeng and Greene, Chris H.},
abstractNote = {Coherent control of interfering one- and two-photon processes has for decades been the subject of research to achieve the redirection of photocurrent. The present study develops two-pathway coherent control of ground-state helium atom above-threshold photoionization for energies up to the N = 2 threshold, based on a multichannel quantum defect and R-matrix calculation. Three parameters are controlled in our treatment: the optical interference phase ΔΦ, the reduced electric field strength χ = $\mathscr{E}^2_ω$$\mathscr{E}_{2ω}$, and the final state energy ε. A small energy change near a resonance is shown to flip the emission direction of photoelectrons with high efficiency, through an example where 90% of photoelectrons whose energy is near the 2p21Se resonance flip their emission direction. However, the large fraction of photoelectrons ionized at the intermediate state energy, which are not influenced by the optical control, make this control scheme challenging to realize experimentally.},
doi = {10.1103/physreva.103.053118},
journal = {Physical Review A},
number = 5,
volume = 103,
place = {United States},
year = {Mon May 24 00:00:00 EDT 2021},
month = {Mon May 24 00:00:00 EDT 2021}
}
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