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SUMMARY:Plasmonic Nanoantenna–Assisted Sub-MeV Proton Acceleration at Mo
 derate Laser Intensities
DTSTART:20260515T090000Z
DTEND:20260515T100000Z
DTSTAMP:20260526T113600Z
UID:indico-event-1793@indico.wigner.hu
DESCRIPTION:Speakers: Konstantin Zsukovszkij (HUN-REN Wigner RCP)\n\nLaser
 -driven proton acceleration typically requires ultrahigh intensities excee
 ding 1020 W/cm2 to generate relativistic hot electrons and strong electr
 ostatic sheath fields. Here\, we demonstrate via three-dimensional particl
 e-in-cell simulations that metallic nanoantennas embedded in hydrogen-rich
  media enable sub-MeV proton acceleration at moderate intensities near 101
 8 W/cm2. Resonant nanoantennas focus femtosecond laser energy into nanos
 cale volumes through plasmon-enhanced near fields\, driving localized elec
 tron heating and forming charge-separation fields around the structures. T
 hree-dimensional crossed and paired nanoantennas with 3λ/2 arm lengths su
 pport hybridized plasmon modes that produce extended high-field regions fo
 r particle acceleration. These structures accelerate protons to ~0.6 MeV w
 ith two orders of magnitude lower intensity than conventional target‑nor
 mal sheath acceleration (TNSA) schemes. The study establishes plasmonic na
 noantennas as nanoscale mediators of laser energy for compact\, moderate-i
 ntensity proton acceleration\, offering design pathways for laser-target e
 ngineering in high-power laser applications.\n\nhttps://indico.wigner.hu/e
 vent/1793/
LOCATION:Tanácsterem (III. ép.)
URL:https://indico.wigner.hu/event/1793/
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