arXiv subjects

A. Ghasempour Ardakani

Publications and source records attributed to A. Ghasempour Ardakani.

2 recordsLinked to original sources

arXiv2019

Metamaterials mimic the black holes: the effects of charge and rotation on the optical properties

Motivated by investigation of black hole properties in the lab, some interesting subjects such as analogue gravity and transformation optics are generated. In this paper, we look for the analogies between the geometry of a gravitating system and the optical medium. In addition, we recognize that appropriate metamaterials can be used to mimic the propagation of light in the curved spacetimes and behave like black holes. The resemblance of metamaterials with Kerr and Reissner-Nordström spacetimes is studied. At last, we compare the full-wave numerical calculation of light with its optical limit of geometry.

physics.gen-ph↗

arXiv2015

Controlling Anderson localization in disordered heterostructures with Lévy-type distribution

In this paper, we propose a disordered heterostructure in which the distribution of refractive index of one of its constituents follows a Lévy-type distribution characterized by the exponent $α$. For the normal and oblique incidences, the effect of $α$ variation on the localization length is investigated in different frequency ranges. As a result, the controllability of Anderson localization can be achieved by changing the exponent $α$ in the disordered structure having heavy tailed distribution.

cond-mat.stat-mech↗