고투과율 탄성 하이퍼볼릭 메타물질 렌즈의 실험적 검증

Abstract

Subwavelength imaging by metamaterials and extended work to pursue total transmission has been successfully demonstrated with electromagnetic and acoustic waves very recently. However, elastic counterpart has been none and still suffers from considerable loss. Here, for the first time, we propose and realize elastic hyperbolic metamaterial lens to experimentally demonstrate total transmission subwavelength imaging. The main idea is to utilize extreme anisotropy for two essential requirements: total transmission condition in wave propagation direction and hyperbolic and flat dispersion curve over a wide range of transverse wavevectors. In the experiment, the fabricated elastic lens is capable of directly transferring subwavelength information from the input to the output boundary.