Metamateriais: a física do manto de invisibilidade de Harry Potter

Abstract

The cloak of invisibility has attracted the attention of both scientists and laymen, that is due to the frequency with which this theme appears in the tales and science fiction films. In this work, we show that it is possible that there is a cloak that can make small objects invisible. Before analyzing the physical properties of this cloak, we make a brief passage on classical electromagnetism, verifying the interactions of matter with electromagnetic waves. As proposed by physicist Veselago in 1968, we inserted the negative values of electric permittivity and magnetic permeability in Maxwell's equations, theoretically producing metamaterials. We analyze the optical changes with the intention of manipulating electromagnetic waves, thus enabling the existence of the cloak of invisibility.