ELECTROMAGNETIC METALENSES BASED ON NEAR-FIELD ELECTROMAGNETIC WAVES SCANNING SYSTEMS

Lenses are common components in optical experiments and are essential in imaging systems. However, with the development of new optical imaging technologies such as integrated imaging, traditional optical lenses face challenges in miniaturization and integration due to their large size. In recent years, meta-lenses, as planar optical elements, can manipulate light in terms of polarization, amplitude, phase, and other aspects by designing sub-wavelength units. These unique optical properties have also made meta-lenses a hot topic in the field of micro-nano optics in recent years. To inspire students’ interest in researching cutting-edge topics, this paper introduces the working principle of meta-lenses and designs a converging electromagnetic meta-lens. Through numerical simulation and experimental characterization, the focusing performance and anomalous dispersion characteristics of the meta-lens are validated, helping students to better understand meta-lenses and promoting the integration of teaching and research.