ELFT HÍRADÓ

[<vera.horvath AT eli-alps.hu>]

Meghívó az ELI-ALPS szemináriumára

Előadó: Polner Mónika
Cím: Scattering of ultrashort electromagnetic pulses on a system of two
parallel current sheets: the role of the radiation reaction and of the time
delay

Időpont: 2016. szeptember 2. 9 óra
Helyszín: Szeged, Tisza Lajos krt. 85.

Az előadás kivonata:

The reflection and transmission of a few-cycle laser pulse impinging on two
parallel thin metal layers have been analyzed. Our model is an extension of
the one-layer scattering problem described in [1-3], and the analysis is based
on classical electrodynamics and mechanics. The two layers, with thickness
much smaller than the skin depth of the radiation field, are represented by
current sheets, which are embedded in three dielectrics, all with different
index of refraction. The dynamics of the surface currents and the complete
radiation field are described by the coupled system of Maxwell-Lorentz
equations.

In our analysis particular attention has been paid to the role of the
radiation reaction and of the time delay. There are several sources of time
delay in the extended system: due to the angle of incidence of the impinging
laser pulse and due to the propagation time between the two surface current
sheets. In this presentation we show the analytic solution of the resulting
coupled delay differential-difference system of equations when the three
dielectrics have the same index of refraction, besides, we show some numerical
studies of the most general case. The main emphasis is on the effect of the
delay on the dynamics of the system.


References

[1]  S. Varró, Scattering of a few-cycle laser pulse on a thin metal layer :
the effect of the carrier-envelope phase difference, Laser Physics Letters 1,
42-45 (2004).
[2] S. Varró, Linear and Nonlinear Absolute Phase Effects in Interactions of
Ultrashort Laser Pulses with a Metal Nano-Layer or with a Thin Plasma Layer,
Laser and Particle Beams 25, 379-390 (2007).
[3] S. Varró, Generation of rectangular optical waves by relativistic
clipping, Laser Physics 23, 056006 (2013).

A szeminárium angol nyelvű.
Minden érdeklődőt szívesen látunk.