Abstract
| Language | English |
|---|---|
| Pages | 23529-23538 |
| Number of pages | 10 |
| Journal | Optics Express |
| Volume | 27 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 1 Aug 2019 |
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Keywords
- energy transfer
- magnetic fields
- tunable magnetic fields
- plasma
- laser light
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Control of laser light by a plasma immersed in a tunable strong magnetic field. / Zheng, Xiaolong ; Weng, Suming; Ma, Hanghang; Wang, Yuanxiang; Chen, Min; McKenna, Paul; Sheng, Zhengming.
In: Optics Express, Vol. 27, No. 16, 01.08.2019, p. 23529-23538.Research output: Contribution to journal › Article
TY - JOUR
T1 - Control of laser light by a plasma immersed in a tunable strong magnetic field
AU - Zheng, Xiaolong
AU - Weng, Suming
AU - Ma, Hanghang
AU - Wang, Yuanxiang
AU - Chen, Min
AU - McKenna, Paul
AU - Sheng, Zhengming
PY - 2019/8/1
Y1 - 2019/8/1
N2 - The interaction between laser light and an underdense plasma immersed in a spatio-temporally tunable magnetic field is studied analytically and numerically. The transversely nonuniform magnetic field can serve as a magnetic channel, which can act on laser propagation in a similar way to the density channel. The envelope equation for laser intensity evolution is derived, which contains the effects of magnetic channel and relativistic self-focusing. Due to the magnetic field applied, the critical laser power for relativistic self-focusing can be significantly reduced. Theory and particle-in-cell simulations show that a weakly relativistic laser pulse can propagate with a nearly constant peak intensity along the magnetic channel for a distance much longer than its Rayleigh length. By setting the magnetic field tunable in both space and time, the simulation further shows that the magnetized plasma can then act as a lens of varying focal length to control the movement of laser focal spot, decoupling the laser group velocity from the light speed c in vacuum.
AB - The interaction between laser light and an underdense plasma immersed in a spatio-temporally tunable magnetic field is studied analytically and numerically. The transversely nonuniform magnetic field can serve as a magnetic channel, which can act on laser propagation in a similar way to the density channel. The envelope equation for laser intensity evolution is derived, which contains the effects of magnetic channel and relativistic self-focusing. Due to the magnetic field applied, the critical laser power for relativistic self-focusing can be significantly reduced. Theory and particle-in-cell simulations show that a weakly relativistic laser pulse can propagate with a nearly constant peak intensity along the magnetic channel for a distance much longer than its Rayleigh length. By setting the magnetic field tunable in both space and time, the simulation further shows that the magnetized plasma can then act as a lens of varying focal length to control the movement of laser focal spot, decoupling the laser group velocity from the light speed c in vacuum.
KW - energy transfer
KW - magnetic fields
KW - tunable magnetic fields
KW - plasma
KW - laser light
U2 - 10.1364/OE.27.023529
DO - 10.1364/OE.27.023529
M3 - Article
VL - 27
SP - 23529
EP - 23538
JO - Optics Express
T2 - Optics Express
JF - Optics Express
SN - 1094-4087
IS - 16
ER -