Details
| Original language | English |
|---|---|
| Article number | 013115 |
| Journal | Physical Review A |
| Volume | 106 |
| Issue number | 1 |
| Publication status | Published - 28 Jul 2022 |
Abstract
Keywords
- physics.optics, physics.atom-ph
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 106, No. 1, 013115, 28.07.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High order Brunel harmonics and supercontinuum formed by a weak optical pump in presence of a strong terahertz field
AU - Babushkin, Ihar
AU - Demircan, Ayhan
AU - Morgner, Uwe
AU - Savel'Ev, A.
N1 - Funding Information: A.S. acknowledges support from the Russian Science Foundation under Project No. 20-19-00148. I.B. and U.M. thank Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), under Projects No. BA 4156/4-2 and No. MO 850-19/2, for support. I.B., A.D., and U.M. acknowledge support from Germany's Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project No. 390833453).
PY - 2022/7/28
Y1 - 2022/7/28
N2 - Brunel harmonics appear in the optical response of an atom in process of laser-induced ionization, when the electron leaves the atom and is accelerated in the strong optical field. In contrast to recollision-based harmonics, the Brunel mechanism does not require the electron returning to the core. Here we show that in the presence of a strong ionizing terahertz (THz) field, even a weak driving field at the optical frequencies allow for generating Brunel harmonics effectively. The strong ionizing THz pump suppresses recollisions, making Brunel dominant in a wide spectral range. High-order Brunel harmonics may form a coherent carrier-envelope-phase insensitive supercontinuum, compressible into an isolated pulse with the duration down to 100 attoseconds.
AB - Brunel harmonics appear in the optical response of an atom in process of laser-induced ionization, when the electron leaves the atom and is accelerated in the strong optical field. In contrast to recollision-based harmonics, the Brunel mechanism does not require the electron returning to the core. Here we show that in the presence of a strong ionizing terahertz (THz) field, even a weak driving field at the optical frequencies allow for generating Brunel harmonics effectively. The strong ionizing THz pump suppresses recollisions, making Brunel dominant in a wide spectral range. High-order Brunel harmonics may form a coherent carrier-envelope-phase insensitive supercontinuum, compressible into an isolated pulse with the duration down to 100 attoseconds.
KW - physics.optics
KW - physics.atom-ph
UR - http://www.scopus.com/inward/record.url?scp=85135765227&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.106.013115
DO - 10.1103/PhysRevA.106.013115
M3 - Article
VL - 106
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 1
M1 - 013115
ER -