Nonlocality-Induced Negative Refraction and Subwavelength Imaging by Parabolic Dispersions in Metal-Dielectric Multilayered Structures with Effective Zero Permittivity

摘要

We investigate metal-dielectric multilayered structures with an effectively zero permittivity. Nonlocality induced by the surface plasmons in such structures can produce intriguing dispersions characterized by two crossing branches of parabolas. We obtain the critical conditions to set the two branches of parabolas apart, and reverse the direction of group velocity such that the system becomes capable of negative refraction as well as subwavelength imaging. Such phenomena theoretically exist in the quasistatic limit.