Dark-field hyperlens: Super-resolution imaging of weakly scattering objects

TL;DR

This paper introduces a dark-field hyperlens that enables super-resolution imaging of weakly scattering objects by transmitting only high-wavevector waves, effectively blocking background light and enhancing imaging of subwavelength features.

Contribution

The paper presents a novel multilayer hyperlens design that achieves dark-field super-resolution imaging by selectively transmitting large-wavevector waves while blocking propagating waves.

Findings

Numerical demonstration of the hyperlens effectiveness

Enhanced imaging of weakly scattering subwavelength objects

Potential applications in label-free biological imaging

Abstract

We propose and numerically demonstrate a technique for subwavelength imaging based on a metal-dielectric multilayer hyperlens designed in such a way that only the large-wavevector waves are transmitted while all propagating waves from the image area are blocked by the hyperlens. As a result, the image plane only contains scattered light from subwavelength features of the objects and is free from background illumination. Similar in spirit to conventional dark-field microscopy, the proposed dark-field hyperlens is promising for optical imaging of weakly scattering subwavelength objects, such as optical nanoscopy of label-free biological objects.