2 papers
physics.optics2026
Exact electromagnetic multipole expansion using elementary current multipoles
Radoslaw Kolkowski, Sagar Sehrawat, Andriy Shevchenko
Multipole expansion plays an important role in the description of electromagnetic scatterers, allowing them to be accurately characterized by a small set of expansion coefficients.…
physics.optics2025
Near-field enhancement by a metasurface at octupole plasmon resonance in periodic disc dimers
Sagar Sehrawat, Klas Lindfors, Andriy Shevchenko
Local intensity enhancement by plasmonic nanoparticles is widely used in optics and photonics. However, the effect is usually based on dipole resonances in the particles. Recently,…