311 citations · 787 across the 26 of their papers we have counts for
26 papers
Multipolar Pseudochirality Induced Optical Torque
Karim Achouri, Mintae Chung, Andrei Kiselev +1
It has been observed that achiral nano-particles, such as flat helices, may be subjected to an optical torque even when illuminated by normally incident linearly polarized light. H…
Quadrupolar susceptibility modeling of substrated metasurfaces with application to the generalized Brewster effect
Ville Tiukuvaara, Olivier J. F. Martin, Karim Achouri
We derive generalized sheet transition conditions (GSTCs) including dipoles and quadrupoles, using generalized functions (distributions). This derivation verifies that the GSTCs ar…
Demonstration of a plasmonic nonlinear pseudo-diode
Sergejs Boroviks, Andrei Kiselev, Karim Achouri +1
We demonstrate a nonlinear plasmonic metasurface that exhibits strongly asymmetric second-harmonic generation: nonlinear scattering is efficient upon excitation in one direction an…
Mind the gap between theory and experiment
Andrei Kiselev, Jeonghyeon Kim, Olivier J. F. Martin
We discuss some examples where numerical simulations based on effectively fabricated nanostructures can provide additional insights into an experiment. Focusing on plasmonics, we s…
Spatial Symmetries in Multipolar Metasurfaces: From Asymmetric Angular Transmittance to Multipolar Extrinsic Chirality
Karim Achouri, Ville Tiukuvaara, Olivier J. F. Martin
We propose a framework that connects the spatial symmetries of a metasurface to its material parameter tensors and its scattering matrix. This provides a simple yet effective way t…
Multipolar expansions for scattering and optical force calculations beyond the long wavelength approximation
Marco Riccardi, Andrei Kiselev, Karim Achouri +1
We review three different approaches for the calculation of electromagnetic multipoles, namely the Cartesian primitive multipoles, the Cartesian irreducible multipoles and the sphe…