ELFT HÍRADÓ

[Somogyi Gábor <somogyi.gabor AT wigner.hun-ren.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


        Konstantin Zsukovszkij
        (HUN-REN Wigner FK)


"Plasmonic Nanoantenna–Assisted Sub-MeV Proton Acceleration at Moderate 
Laser Intensities”


címmel tartandó szemináriumára.


Kivonat:



Laser-driven proton acceleration typically requires ultrahigh 
intensities exceeding 1020 W/cm2 to generate relativistic hot electrons 
and strong electrostatic sheath fields. Here, we demonstrate via 
three-dimensional particle-in-cell simulations that metallic 
nanoantennas embedded in hydrogen-rich media enable sub-MeV proton 
acceleration at moderate intensities near 1018 W/cm2. Resonant 
nanoantennas focus femtosecond laser energy into nanoscale volumes 
through plasmon-enhanced near fields, driving localized electron heating 
and forming charge-separation fields around the structures. 
Three-dimensional crossed and paired nanoantennas with 3λ/2 arm lengths 
support hybridized plasmon modes that produce extended high-field 
regions for particle acceleration. These structures accelerate protons 
to ~0.6 MeV with two orders of magnitude lower intensity than 
conventional target‑normal sheath acceleration (TNSA) schemes. The study 
establishes plasmonic nanoantennas as nanoscale mediators of laser 
energy for compact, moderate-intensity proton acceleration, offering 
design pathways for laser-target engineering in high-power laser 
applications.



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2026 május 15. péntek d.e. 11 óra [SZOKÁSOSTÓL ELTÉRŐ IDŐPONT]

Szívesen látunk minden érdeklődőt.


                  Somogyi Gábor