Broadband electromagnetic cloaking of long cylindrical objects.
Electromagnetic cloaks are devices that make objects undetectable for probing with electromagnetic waves. The known realizations of transformational-optics cloaks require materials with exotic electromagnetic properties and offer only limited performance in narrow frequency bands. Here, we demonstrate a wideband and low-loss cloak whose operation is not based on the use of exotic electromagnetic materials, which are inevitably dispersive and lossy. Instead, we use a simple structure made of metal layers. In this Letter, we present an experimental demonstration of cloaking for microwaves and simulation results for cloaking in the visible range.
Tretyakov
Sergei
S
Department of Radio Science and Engineering, Helsinki University of Technology, FI-02015 TKK, Finland. sergei.tretyakov@tkk.fi
Alitalo
Pekka
P
Luukkonen
Olli
O
Simovski
Constantin
C