关键词: 超透镜；双曲超透镜；倏逝波；远场成像；衍射极限

Abstract: It presents the design of a hyperlens with the multilayered halfcylindrical structure, which can get the farfield optical imaging beyond the diffraction limit at different wavelengths. The hyperlens consists of two kinds of semiconductors whose dielectric permittivity depends on the operating wavelength. Numerical simulation shows that the hyperlens can fulfill farfield superlensing conditions at multiple different wavelengths. The wavelength range of the hyperlens can be controlled by choosing appropriate dielectrics, and each range can be finely tuned via the change in the thickness radio of the two dielectric layers.

Key words: superlens; hyperlens; evanescent wave; farfield imaging; diffraction limit