Abstract
Abstract
The introduction of ultratransparent medium has not yet solved the problem of transmission loss caused by reflection in negative refraction (NR) devices. In this study, theoretical analysis and simulation verification are carried out and an ultratransparent medium with wide-angle NR-index is proposed; the imaging with its flat lens is discussed. A photonic crystal (PC) is designed as an instance of the medium, and the rationality was analyzed. The PC can realize NR within 50° as well as positive refraction (PR) within 75° with transmittances over 99%. It is an ideal material for multifunctional NR/PR devices with ultra-low loss.
Funder
Fundamental Research Funds for the Central Universities
Key Project of Scientific Research of Hunan Provincial Education Department
Natural Science Foundation of Hunan Province
National Natural Science Foundation of China
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials