Momentum Absorption and Magnetic Field Generation by Obliquely Incident Light

Year: 2019

Authors: Macchi A., Grassi A., Amiranoff F., Riconda C.

Autors Affiliation: 1) CNR, National Institute of Optics (INO), via G. Moruzzi 1, 56124 Pisa, Italy
2) Dipartimento di Fisica Enrico Fermi, Università di Pisa, l.go Bruno Pontecorvo 3, 56127 Pisa, Italy
3) High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
4) LULI-UPMC: Sorbonne Universités, CNRS, École Polytechnique, CEA, 75005 Paris, France

Abstract: The partial reflection of an electromagnetic (EM) wave from a medium leads to absorption of
momentum in the direction perpendicular to the surface (the standard radiation pressure) and, for oblique
incidence on a partially reflecting medium, also in the parallel direction. This latter component drives
a transverse current and a slowly growing, quasi-static magnetic field in the evanescence “skin” layer.
Through a simple model we illustrate how EM momentum is transfered to ions and estimate the value of
the magnetic field which may be of the order of the driving EM wave field, i.e. up to several hundreds of
megagauss for high-intensity laser-solid interactions.


Volume: 134 (9)      Pages from: 420-1  to: 420-9

KeyWords: electromagnetic momentum, optical absorption, nonlinear optics, magnetic field generation, laser-plasma interactions
DOI: 10.1140/epjp/i2019-12802-0

Citations: 1
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