Non-Hermitian two-dimensional photonic crystal flat lens

TL;DR

This paper proposes a non-Hermitian 2D photonic crystal flat lens that leverages negative refraction and non-Hermitian principles to achieve super-resolution imaging with enhanced intensity and resolution.

Contribution

It introduces a novel non-Hermitian design in photonic crystal lenses to improve imaging performance beyond traditional limits.

Findings

Achieves super-resolution imaging of point sources.

Enhances imaging intensity and resolution through non-Hermitian effects.

Utilizes negative refraction in the second photonic band.

Abstract

In this paper, a non-Hermitian two-dimensional photonic crystal flat lens is proposed. The negative refraction of the second band of photonic crystal is utilized to realize super-resolution imaging of the point source. Based on the principles of non-Hermitian systems, a negative imaginary part is introduced into the imaging frequency, in which case the imaging intensity and resolution are improved. The results indicate that the non-Hermitian system provides a new method to improve the imaging performance of the photonic crystal lens.