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@article{Shi:2018:10.1103/PhysRevLett.121.145002,
author = {Shi, Y and Vieira, J and Trines, RMGM and Bingham, R and Shen, BF and Kingham, RJ},
doi = {10.1103/PhysRevLett.121.145002},
journal = {Physical Review Letters},
title = {Magnetic field generation in plasma waves driven by copropagating intense twisted lasers},
url = {http://dx.doi.org/10.1103/PhysRevLett.121.145002},
volume = {121},
year = {2018}
}

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TY  - JOUR
AB  - We present a new magnetic field generation mechanism in underdense plasmas driven by the beating of two, copropagating, Laguerre-Gaussian orbital angular momentum laser pulses with different frequencies and also different twist indices. The resulting twisted ponderomotive force drives up an electron plasma wave with a helical rotating structure. To second order, there is a nonlinear rotating current leading to the onset of an intense, static axial magnetic field, which persists over a long time in the plasma (ps scale) after the laser pulses have passed by. The results are confirmed in three-dimensional particle-in-cell simulations and also theoretical analysis. For the case of 300 fs duration, 3.8×1017  W/cm2 peak laser intensity we observe magnetic field of up to 0.4 MG. This new method of magnetic field creation may find applications in charged beam collimation and microscale pinch.
AU  - Shi,Y
AU  - Vieira,J
AU  - Trines,RMGM
AU  - Bingham,R
AU  - Shen,BF
AU  - Kingham,RJ
DO  - 10.1103/PhysRevLett.121.145002
PY  - 2018///
SN  - 0031-9007
TI  - Magnetic field generation in plasma waves driven by copropagating intense twisted lasers
T2  - Physical Review Letters
UR  - http://dx.doi.org/10.1103/PhysRevLett.121.145002
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000446561300005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/65420
VL  - 121
ER  -

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