Metamaterials applications in radiocommunication and biomedical engineering

Metamaterials are complex materials with artificial structure which have special features. These features attract many scientists to use metamaterial structure in many research areas [1]. The metamaterials can enhance properties of microwave and optical passive and active components and also to exceed some limitation of devices used in technical practice [1]. Examples of scientific and technical fields which are concerned are electrical engineering, micro- and nanotechnology, microwave engineering, optics, optoelectronics, and semiconductor technologies, biomedical engineering [1]. In plasmonics, the interplay between propagating electromagnetic waves and free-electron oscillations in materials are exploited to create new components and applications [1]. On the other hand, metamaterials refer to artificial composites in which small artificial elements, through their collective interaction, create a desired and unexpected macroscopic response function that is not present in the constituent materials [1].