3 papers
physics.optics2026
Hysteresis in the complex nonlinear refractive index of a homogeneous and isotropic medium
Igor Kuzmenko, Y. B. Band, Yshai Avishai +1
We calculate the permittivity, , for a medium with a quadratic electro-optic effect, modeling it as a Duffing oscillator. The nonlinear refractive index and…
cond-mat.quant-gas2024
Fermionic atoms in a spin-dependent optical lattice potential: topological insulators with broken time-reversal symmetry
Igor Kuzmenko, MirosÅaw Brewczyk, Grzegorz Åach +2
We propose a novel approach to study the topological properties of matter. In this approach, fermionic atoms are placed in an external magnetic field and in a two-dimensional spin-…
physics.optics2024
Negative Refraction in isotropic achiral and chiral materials
Y. B. Band, Igor Kuzmenko, Marek Trippenbach
We show that negative refraction in materials can occur at frequencies where the real parts of the permittivity $\veps(Ï)$ and the permeability have different sign,…