Numerical Investigation on a Hyperlens with a Large Radius Inner-Surface for Super-Resolution Imaging

Jiming Yang,Qiongchan Gu,Yu Ying,Xiaoxiao Jiang,Jiangtao Lv,Guangyuan Si

doi:10.3390/photonics7040107

Jiming Yang, Qiongchan Gu + Show 4 more

Open Access

https://doi.org/10.3390/photonics7040107

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Journal: Photonics	Publication Date: Nov 10, 2020
Citations: 1	License type: CC BY 4.0

Affiliation: Shenyang Jianzhu University, Northeastern University

Abstract

Hyperlensing devices have drawn great attention in recent years due to their ability to amplify the subwavelength image of objects with more detail and information. In this work, a hyperlens with a radian inner surface is designed and demonstrated. The proposed hyperlens is capable of imaging different types of sub-wavelength objects efficiently. Plasmonic resonant cavity is also employed in order to achieve a super-resolution imaging effect. Different objects are investigated to test the performance of the proposed hyperlens. As expected, our hyperlens shows better tolerance than the conventional hyperlensing designs and can achieve imaging resolution down to 60 nm for different types of objects.

Highlights

The resolution of a conventional optical imaging system is generally constrained by the diffraction limit, which denotes that high spatial frequency information carried by evanescent waves cannot be captured by a normal object lens
A novel hyperlensing device with a radian inner surface is proposed for super-resolution imaging applications
Both conventional slits objects and unconstrained objects are imaged with resolution below 60 nm at 365 nm wavelength and 100 nm above the hyperlens, which is in the sub-diffraction-limit scale

Summary

Introduction

The resolution of a conventional optical imaging system is generally constrained by the diffraction limit, which denotes that high spatial frequency information carried by evanescent waves cannot be captured by a normal object lens. To overcome this limit, many methods have been proposed, such as stimulated emission depletion (STED) [1], structured illumination microscopy (SIM) [2], and near-field scanning optical microscopy (NSOM) [3]. The perfect lens was first proposed by Pendry [4] and the concept of overcoming the diffraction limit (superlens) [5,6,7,8] was demonstrated.

Methods

Discussion

Conclusion