Square Maxwell's fish-eye lens for broadband achromatic super-resolution imaging

TL;DR

This paper introduces a novel square Maxwell's fish-eye lens that achieves broadband, achromatic super-resolution imaging at microwave frequencies, overcoming previous limitations of narrow bandwidth and low efficiency.

Contribution

The work presents a new solid immersion lens design based on transformation optics, enabling broadband super-resolution imaging and long-distance multi-source information transmission.

Findings

Achieves broadband (7-16GHz) super-resolution imaging with ~0.2 wavelength resolution.

Demonstrates a super-resolution information transmission channel for long-distance multi-source data.

Surpasses previous lenses in bandwidth and efficiency for microwave super-resolution imaging.

Abstract

Broadband super-resolution imaging is important in optical field. To achieve super-resolution imaging, various lenses from superlens to solid immersion lens have been designed and fabricated in recent years. However, the imaging is unsatisfactory due to low work efficiency and narrow band. In this work, we propose a solid immersion square Maxwell's fish-eye lens which realizes broadband (7-16GHz) achromatic super-resolution imaging with full width at half maximum around 0.2 wavelength based on transformation optics at microwave frequencies. In addition, a super-resolution information transmission channel is also designed to realize long-distance multi-source super-resolution information transmission based on the super-resolution lens.