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Related Experiment Video

Updated: May 12, 2026

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging

Published on: September 8, 2017

Sub-wavelength focusing meta-lens.

Tapashree Roy¹, Edward T F Rogers, Nikolay I Zheludev

¹Optoelectronics Research Centre & Centre for Photonic Metamaterials, University of Southampton, Southampton, SO17 BJ, UK.

|April 3, 2013

Summary

Researchers created a plasmonic metamaterial that focuses light into tiny spots beyond its surface. This breakthrough in metamaterial optics uses superoscillation to achieve sub-wavelength focusing for advanced applications.

Area of Science:

Photonics and Metamaterials
Plasmonics
Nanotechnology

Background:

Plasmonic metamaterials offer unique light manipulation capabilities.
Achieving sub-wavelength focusing beyond the near-field is a significant challenge in optics.

Purpose of the Study:

To demonstrate sub-wavelength light focusing beyond the near-field using a planar plasmonic metamaterial.
To investigate the role of spatially variable meta-atom parameters in achieving this focusing effect.

Main Methods:

Fabrication of a gold film with nano-structured meta-lenses.
Characterization of transmitted light focusing using optical microscopy.
Analysis of the focusing phenomenon in relation to meta-atom parameters and superoscillation.

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Main Results:

Generation of sub-wavelength hot-spots with a diameter of 160 nm (0.2λ).
Successful focusing of transmitted light beyond the near-field of the metamaterial.
Observation of these hot-spots when illuminated by an 800 nm wavelength.

Conclusions:

Planar plasmonic metamaterials with spatially varying parameters can achieve super-critical focusing.
The phenomenon of superoscillation is responsible for the observed sub-wavelength hot-spots beyond the near-field.
This work opens new avenues for sub-wavelength imaging and optical manipulation.