Abstract
| Language | English |
|---|---|
| Pages | 545-551 |
| Number of pages | 6 |
| Journal | Laser and Particle Beams |
| Volume | 34 |
| Issue number | 3 |
| Early online date | 31 Aug 2016 |
| DOIs | |
| Publication status | Published - 30 Sep 2016 |
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Keywords
- high harmonic generation
- laser-plasma interaction
- magnetic field
- laser-solid interaction
- longitudinal motion
- magnetic field- induced harmonics
- oscillating mirror high harmonics
- particle-in-cell simulations
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Effect of transverse magnetic fields on high harmonic generation in intense laser-solid interaction. / Mu, J.; Li, F.-Y.; Sheng, Z.-M.; Zhang, J.
In: Laser and Particle Beams, Vol. 34, No. 3, 30.09.2016, p. 545-551.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effect of transverse magnetic fields on high harmonic generation in intense laser-solid interaction
AU - Mu, J.
AU - Li, F.-Y.
AU - Sheng, Z.-M.
AU - Zhang, J.
N1 - This article has been published in Laser and Particle Beams http://dx.doi.org/10.1017/S0263034616000446. This version is free to view and download for private research and study only. Not for re-distribution, re-sale or use in derivative works. © Cambridge University Press.
PY - 2016/9/30
Y1 - 2016/9/30
N2 - The effect of transverse magnetic fields on surface high harmonic generation in intense laser-solid interactions is investigated. It is shown that the longitudinal motion of electrons can be coupled with the transverse motion via the magnetic fields, which lead to even-order harmonics under normal laser incidence. The dependence of the coupling efficiency and hence even harmonic generation with preplasma scalelength and magnetic field strength are presented based upon particle-in-cell simulations. When the magnetic field is parallel to the laser electric field, the spectral intensity of the second harmonic is proportional to the magnetic field strength in a wide range up to 160MG, while the situation with the magnetic field perpendicular to the laser electric field is more complicated. The second harmonic generation due to the magnetic field also tends to increase with the plasma density scalelengths, which is different from the high harmonics generation by the oscillating mirror mechanism. With the increase of the laser spot size from a laser wavelength λL, both the magnetic field induced harmonics and oscillating mirror high harmonics tend to increase first and then become saturated after 3λL. The magnetic field induced second harmonic may be used to evaluate large self-generated magnetic fields developed near the critical density region and the preplasma conditions.
AB - The effect of transverse magnetic fields on surface high harmonic generation in intense laser-solid interactions is investigated. It is shown that the longitudinal motion of electrons can be coupled with the transverse motion via the magnetic fields, which lead to even-order harmonics under normal laser incidence. The dependence of the coupling efficiency and hence even harmonic generation with preplasma scalelength and magnetic field strength are presented based upon particle-in-cell simulations. When the magnetic field is parallel to the laser electric field, the spectral intensity of the second harmonic is proportional to the magnetic field strength in a wide range up to 160MG, while the situation with the magnetic field perpendicular to the laser electric field is more complicated. The second harmonic generation due to the magnetic field also tends to increase with the plasma density scalelengths, which is different from the high harmonics generation by the oscillating mirror mechanism. With the increase of the laser spot size from a laser wavelength λL, both the magnetic field induced harmonics and oscillating mirror high harmonics tend to increase first and then become saturated after 3λL. The magnetic field induced second harmonic may be used to evaluate large self-generated magnetic fields developed near the critical density region and the preplasma conditions.
KW - high harmonic generation
KW - laser-plasma interaction
KW - magnetic field
KW - laser-solid interaction
KW - longitudinal motion
KW - magnetic field- induced harmonics
KW - oscillating mirror high harmonics
KW - particle-in-cell simulations
UR - https://www.cambridge.org/core/journals/laser-and-particle-beams
U2 - 10.1017/S0263034616000446
DO - 10.1017/S0263034616000446
M3 - Article
VL - 34
SP - 545
EP - 551
JO - Laser and Particle Beams
T2 - Laser and Particle Beams
JF - Laser and Particle Beams
SN - 0263-0346
IS - 3
ER -