Unravelling the dynamical origin of below- and near-threshold harmonic generation of H2+ in an intense NIR laser field
Abstract
Recently, the study of near- and below- threshold regime harmonics as a potential source of intense coherent vacuum-ultraviolet radiation has received considerable attention. However, the dynamical origin of these lower harmonics, particularly for the molecular systems, is less understood and largely unexplored. Here we perform the first fully ab initio and high precision 3D quantum study of the below- and near-threshold harmonic generation of H2+ molecules in an intense 800-nm near-infrared (NIR) laser field. Furthermore, combining with a synchrosqueezing transform of the quantum time-frequency spectrum and an extended semiclassical analysis, we explore in-depth the roles of various quantum trajectories, including short- and long trajectories, multiphoton trajectories, resonance-enhanced trajectories, and multiple rescattering trajectories of the below- and near- threshold harmonic generation processes. Our results shed new light on the dynamical origin of the below- and near-threshold harmonic generation and various quantum trajectories for diatomic molecules for the first time.
- Authors:
-
- National Taiwan Univ., Taipei (Taiwan)
- National Taiwan Univ., Taipei (Taiwan); Univ. of Kansas, Lawrence, KS (United States)
- Publication Date:
- Research Org.:
- Univ. of Kansas, Lawrence, KS (United States). Dept. of Chemistry
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1389831
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; Atomic and molecular interactions with photons; High-harmonic generation
Citation Formats
Heslar, John, and Chu, Shih-I. Unravelling the dynamical origin of below- and near-threshold harmonic generation of H2+ in an intense NIR laser field. United States: N. p., 2016.
Web. doi:10.1038/srep37774.
Heslar, John, & Chu, Shih-I. Unravelling the dynamical origin of below- and near-threshold harmonic generation of H2+ in an intense NIR laser field. United States. https://doi.org/10.1038/srep37774
Heslar, John, and Chu, Shih-I. Thu .
"Unravelling the dynamical origin of below- and near-threshold harmonic generation of H2+ in an intense NIR laser field". United States. https://doi.org/10.1038/srep37774. https://www.osti.gov/servlets/purl/1389831.
@article{osti_1389831,
title = {Unravelling the dynamical origin of below- and near-threshold harmonic generation of H2+ in an intense NIR laser field},
author = {Heslar, John and Chu, Shih-I.},
abstractNote = {Recently, the study of near- and below- threshold regime harmonics as a potential source of intense coherent vacuum-ultraviolet radiation has received considerable attention. However, the dynamical origin of these lower harmonics, particularly for the molecular systems, is less understood and largely unexplored. Here we perform the first fully ab initio and high precision 3D quantum study of the below- and near-threshold harmonic generation of H2+ molecules in an intense 800-nm near-infrared (NIR) laser field. Furthermore, combining with a synchrosqueezing transform of the quantum time-frequency spectrum and an extended semiclassical analysis, we explore in-depth the roles of various quantum trajectories, including short- and long trajectories, multiphoton trajectories, resonance-enhanced trajectories, and multiple rescattering trajectories of the below- and near- threshold harmonic generation processes. Our results shed new light on the dynamical origin of the below- and near-threshold harmonic generation and various quantum trajectories for diatomic molecules for the first time.},
doi = {10.1038/srep37774},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {Thu Nov 24 00:00:00 EST 2016},
month = {Thu Nov 24 00:00:00 EST 2016}
}
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Works referencing / citing this record:
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