Observation of attosecond electron dynamics in the photoelectron momentum distribution of atoms using few-cycle laser pulses
Abstract
The method of time-resolved measurement with ultrashort laser pulses is vital to the development of attosecond science. Pump-probe measurements using a train of attosecond pulses in combination with a near-infrared (NIR) multicycle driving laser have been successful in capturing the intercycle electron dynamics which repeats every optical cycle and leads to above-threshold ionization (ATI) spectra in the frequency domain. Here in this work, we study the effect of a carrier-envelope phase (CEP) in a few-cycle (< 6 fs) NIR laser pulse on the photoelectron momentum distribution (PMD) of a hydrogen atom and show that interference patterns in a PMD change dramatically with CEPs in the few-cycle regime. When the few-cycle driving laser pulse has a sine shape, the double-slit interference with characteristic modulation of ATI peaks dominates the PMD. On the other hand, when the driving pulse has a cosine shape, the holographical interference featured by a spider-like pattern is isolated. Our results suggest that the CEP-stable few-cycle laser pulses can be used to identify different types of intracycle interference structures in a PMD which reveal the underlying subcycle electron dynamics on an attosecond timescale.
- Authors:
-
- Indiana State Univ., Terre Haute, IN (United States)
- Publication Date:
- Research Org.:
- Indiana State Univ., Terre Haute, IN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1657856
- Grant/Contract Number:
- FG02-06ER46304; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review A
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 5; Journal ID: ISSN 2469-9926
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS
Citation Formats
Murakami, Mitsuko, and Zhang, Guo-Ping. Observation of attosecond electron dynamics in the photoelectron momentum distribution of atoms using few-cycle laser pulses. United States: N. p., 2020.
Web. doi:10.1103/physreva.101.053439.
Murakami, Mitsuko, & Zhang, Guo-Ping. Observation of attosecond electron dynamics in the photoelectron momentum distribution of atoms using few-cycle laser pulses. United States. https://doi.org/10.1103/physreva.101.053439
Murakami, Mitsuko, and Zhang, Guo-Ping. Thu .
"Observation of attosecond electron dynamics in the photoelectron momentum distribution of atoms using few-cycle laser pulses". United States. https://doi.org/10.1103/physreva.101.053439. https://www.osti.gov/servlets/purl/1657856.
@article{osti_1657856,
title = {Observation of attosecond electron dynamics in the photoelectron momentum distribution of atoms using few-cycle laser pulses},
author = {Murakami, Mitsuko and Zhang, Guo-Ping},
abstractNote = {The method of time-resolved measurement with ultrashort laser pulses is vital to the development of attosecond science. Pump-probe measurements using a train of attosecond pulses in combination with a near-infrared (NIR) multicycle driving laser have been successful in capturing the intercycle electron dynamics which repeats every optical cycle and leads to above-threshold ionization (ATI) spectra in the frequency domain. Here in this work, we study the effect of a carrier-envelope phase (CEP) in a few-cycle (< 6 fs) NIR laser pulse on the photoelectron momentum distribution (PMD) of a hydrogen atom and show that interference patterns in a PMD change dramatically with CEPs in the few-cycle regime. When the few-cycle driving laser pulse has a sine shape, the double-slit interference with characteristic modulation of ATI peaks dominates the PMD. On the other hand, when the driving pulse has a cosine shape, the holographical interference featured by a spider-like pattern is isolated. Our results suggest that the CEP-stable few-cycle laser pulses can be used to identify different types of intracycle interference structures in a PMD which reveal the underlying subcycle electron dynamics on an attosecond timescale.},
doi = {10.1103/physreva.101.053439},
journal = {Physical Review A},
number = 5,
volume = 101,
place = {United States},
year = {Thu May 28 00:00:00 EDT 2020},
month = {Thu May 28 00:00:00 EDT 2020}
}
Web of Science
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