Details
| Original language | English |
|---|---|
| Pages (from-to) | 1078-1087 |
| Number of pages | 10 |
| Journal | Journal of Modern Optics |
| Volume | 64 |
| Issue number | 10-11 |
| Publication status | Published - 2 Feb 2017 |
Abstract
Brunel radiation appears as a result of a two-step process of photo-ionization and subsequent acceleration of electron, without the need of electron recollision. We show that for generation of Brunel harmonics at all frequencies, the subcycle ionization dynamics is of critical importance. Namely, such harmonics disappear at the low pump intensities when the ionization dynamics depends only on the slow envelope (so-called multiphoton ionization regime) and not on the instantaneous field. Nevertheless, if the pump pulse contains incommensurate frequencies, Brunel mechanism does generate new frequencies even in the multiphoton ionization regime.
Keywords
- Brunel harmonics, Multi-colour fields, Photo-ionization, Terahertz radiation
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Journal of Modern Optics, Vol. 64, No. 10-11, 02.02.2017, p. 1078-1087.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Terahertz and higher order Brunel harmonics
T2 - From tunnel tomultiphoton ionization regime in tailored fields
AU - Babushkin, Ihar
AU - Brée, Carsten
AU - Dietrich, Christian Markus
AU - Demircan, Ayhan
AU - Morgner, Uwe
AU - Husakou, Anton
N1 - Funding information: We gratefully acknowledge support by the DFG BA 4156/4-1, MO 850/20-1 and Nieders. Vorab ZN3061.
PY - 2017/2/2
Y1 - 2017/2/2
N2 - Brunel radiation appears as a result of a two-step process of photo-ionization and subsequent acceleration of electron, without the need of electron recollision. We show that for generation of Brunel harmonics at all frequencies, the subcycle ionization dynamics is of critical importance. Namely, such harmonics disappear at the low pump intensities when the ionization dynamics depends only on the slow envelope (so-called multiphoton ionization regime) and not on the instantaneous field. Nevertheless, if the pump pulse contains incommensurate frequencies, Brunel mechanism does generate new frequencies even in the multiphoton ionization regime.
AB - Brunel radiation appears as a result of a two-step process of photo-ionization and subsequent acceleration of electron, without the need of electron recollision. We show that for generation of Brunel harmonics at all frequencies, the subcycle ionization dynamics is of critical importance. Namely, such harmonics disappear at the low pump intensities when the ionization dynamics depends only on the slow envelope (so-called multiphoton ionization regime) and not on the instantaneous field. Nevertheless, if the pump pulse contains incommensurate frequencies, Brunel mechanism does generate new frequencies even in the multiphoton ionization regime.
KW - Brunel harmonics
KW - Multi-colour fields
KW - Photo-ionization
KW - Terahertz radiation
UR - http://www.scopus.com/inward/record.url?scp=85011599252&partnerID=8YFLogxK
U2 - 10.1080/09500340.2017.1285066
DO - 10.1080/09500340.2017.1285066
M3 - Article
AN - SCOPUS:85011599252
VL - 64
SP - 1078
EP - 1087
JO - Journal of Modern Optics
JF - Journal of Modern Optics
SN - 0950-0340
IS - 10-11
ER -