Speaker
Arkady Gonoskov
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/O5.203.pdf
Prospects for producing XUV bursts by laser-plasma interactions in the
regime of relativistic electronic spring
A. Gonoskov1,2,3, T. Blackburn1, M. Blanco4, M.T. Flores-Arias4, B. Svedung Wettervik1,
M. Marklund1
1
Chalmers University of Technology, SE-41296 Gothenburg, Sweden
2
Institute of Applied Physics, RAS, Nizhny Novgorod 603950, Russia
3
Lobachevsky State University of Nizhni Novgorod, Nizhny Novgorod 603950, Russia
4
Universidade de Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
High-intensity lasers provide an opportunity to drive controllable, relativistic plasma dynamics
through the irradiation of solids. In this way, the laser energy can be converted into extreme
ultraviolet (XUV) radiation with tailored properties such as high brightness, ultra-short duration
and tunable polarization. In the regime of relativistic electronic spring (RES), the irradiated
plasma acts as a spring, repeatedly accumulating and releasing the incident energy in the form
of XUV bursts within every optical cycle. These bursts can be a hundred times higher in
intensity as compared to the incident radiation. This manifests a distinct difference from the
relativistic oscillating mirror (ROM) regime, which implies subcycle phase variations without
the change of amplitude. In our study, we analyse the prospects of using the RES regime for
creating laser-based sources of tailored XUV pulses. We use the theoretical principles proposed
in [1] to develop a theory of the process applicable to an arbitrary density profile, laser pulse
shape and polarization [2]. The theory indicates that there are clear possibilities for tuning the
ellipticity of the generated XUV bursts by adjusting the laser polarization and other interaction
parameters [3]. We also demonstrate that the efficient generation of XUV bursts is achievable,
and even enhanced, by the density gradients that naturally emerge in laser-solid interactions
due to the effect of finite contrast [4]. Finally, we assess the possibility of using the generated
XUV busts for driving wake-fields in solids [5].
References:
[1] A. Gonoskov et al. Phys. Rev. E 84, 046403 (2011)
[2] A. Gonoskov Phys. of Plasmas 25, 013108 (2018)
[3] M. Blanco, M. T. Flores-Arias and A. Gonoskov, arXiv:1706.04785 (2017)
[4] T. G. Blackburn, A. A. Gonoskov and M. Marklund, arXiv:1701.07268 (2017)
[5] B. Svedung Wettervik, A. Gonoskov, M. Marklund, Phys. of Plasmas 25, 013107 (2018)
