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.
Department of Radio Science and Engineering, Helsinki University of Technology, FI-02015 TKK, Finland. sergei.tretyakov@tkk.fi
Sergei
S
Tretyakov
Pekka
P
Alitalo
Olli
O
Luukkonen
Constantin
C
Simovski