Optical cloaking with metamaterials

Artificially structured metamaterials have enabled unprecedented flexibility in manipulating electromagnetic waves and producing new functionalities, including the cloak of invisibility based on coordinate transformation. Unlike other cloaking approaches, which are typically limited to subwavelength objects, the . Optical cloaking with metamaterials. Department of Applied Electronics – University “Roma Tre”. In this contribution, we present the design of cylindrical electromagnetic cloaks working at optical .

Metamaterial cloaking is the usage of metamaterials in an invisibility cloak.

The idea of optical cloaking is intriguing and has captured the imagination of both scientists and the general public.

This means that there are very many degrees of freedom in the design of the desired electromagnetic response, allowing for realization of artificial media with quite exotic and extreme properties, such as required for realization of cloaking devices. Although the metamaterial research activities started only quite recently, the . Physicists from ITMO University, Ioffe Institute and Australian National University managed to make homogenous cylindrical objects completely invisible in the microwave range. Contrary to the now prevailing notion of invisibility that relies on metamaterial coatings, the scientists achieved the result using a . A small fraction of the cylindrical cloak. The wires are all perpendicular to the . The external observer is therefore unaware of the presence of the cloak and the object. Such cloaks were recently experimentally demonstrated in the microwave regime using metamaterial structures with feature . On the Quest to Invisibility: Meta-materials and Cloaking.

Wells was not the first writer to talk about . Abstract: In this paper, we present the design of cylindrical and spherical electromagnetic cloaks working at visible frequencies. The cloak design is based on the employment of layered structures consisting of alternating plasmonic and nonplasmonic materials, and . A metamaterial cloak bends light around an object. Invisibility has long been employed in works of science fiction and fantasy, from “ cloaking devices” on spaceships in the various . Here we demonstrate smart metamaterial cloaking , wherein the . After this simplification, the optical space perceived by the horizontal rays becomes the one in Fig.

This optical space has inherited the invisibility performance from the original transformed cloak for horizontal rays. The homogeneity of the medium vastly reduces the complexity of the metamaterial design, because only one metamaterial element is . Invisibility cloaks, a family of optical illusion devices that route electromagnetic ( EM) waves around an . A prior simulation showed that it is possible to create . The rolls are typically around 1cm in diameter and.