Abstract
When an electron is scattered by a tightly focused laser beam in vacuum, the intensity gradient is a critical factor to influence the electron dynamics. In this paper, we have further investigated its influence upon the electron high-harmonic generation (HHG) by treating the spacial gradient of the laser intensity as a ponderomotive potential. Based upon perturbative quantum electrodynamics calculations, it has been found that the main effect of the intensity gradient is the broadening of the originally line HHG spectra. A one-to-one relationship can be built between the beam width and the corresponding line width. Hence, this finding may provide us a promising way to measure the beam width of intense lasers in experiments. In addition, for a laser pulse, we have also studied the different influences from transverse and longitudinal intensity gradients upon HHG.
| Original language | English |
|---|---|
| Pages (from-to) | 95-101 |
| Number of pages | 7 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 117 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
Cite this
Influence of the intensity gradient upon HHG from free electrons scattered by an intense laser beam. / Li, Ankang; Wang, Jiaxiang; Ren, Na; Wang, Pingxiao; Zhu, Wenjun; Li, Xiaoya; Hoehn, Ross; Kais, Sabre.
In: Applied Physics B: Lasers and Optics, Vol. 117, No. 1, 2014, p. 95-101.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Influence of the intensity gradient upon HHG from free electrons scattered by an intense laser beam
AU - Li, Ankang
AU - Wang, Jiaxiang
AU - Ren, Na
AU - Wang, Pingxiao
AU - Zhu, Wenjun
AU - Li, Xiaoya
AU - Hoehn, Ross
AU - Kais, Sabre
PY - 2014
Y1 - 2014
N2 - When an electron is scattered by a tightly focused laser beam in vacuum, the intensity gradient is a critical factor to influence the electron dynamics. In this paper, we have further investigated its influence upon the electron high-harmonic generation (HHG) by treating the spacial gradient of the laser intensity as a ponderomotive potential. Based upon perturbative quantum electrodynamics calculations, it has been found that the main effect of the intensity gradient is the broadening of the originally line HHG spectra. A one-to-one relationship can be built between the beam width and the corresponding line width. Hence, this finding may provide us a promising way to measure the beam width of intense lasers in experiments. In addition, for a laser pulse, we have also studied the different influences from transverse and longitudinal intensity gradients upon HHG.
AB - When an electron is scattered by a tightly focused laser beam in vacuum, the intensity gradient is a critical factor to influence the electron dynamics. In this paper, we have further investigated its influence upon the electron high-harmonic generation (HHG) by treating the spacial gradient of the laser intensity as a ponderomotive potential. Based upon perturbative quantum electrodynamics calculations, it has been found that the main effect of the intensity gradient is the broadening of the originally line HHG spectra. A one-to-one relationship can be built between the beam width and the corresponding line width. Hence, this finding may provide us a promising way to measure the beam width of intense lasers in experiments. In addition, for a laser pulse, we have also studied the different influences from transverse and longitudinal intensity gradients upon HHG.
UR - http://www.scopus.com/inward/record.url?scp=84919877323&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919877323&partnerID=8YFLogxK
U2 - 10.1007/s00340-014-5806-1
DO - 10.1007/s00340-014-5806-1
M3 - Article
VL - 117
SP - 95
EP - 101
JO - Applied Physics B: Photophysics and Laser Chemistry
JF - Applied Physics B: Photophysics and Laser Chemistry
SN - 0721-7269
IS - 1
ER -