Resonant Metalenses for Breaking the Diffraction Barrier

Details Resonant Metalenses for Breaking the Diffraction Barrier Resonant Metalenses for Breaking the Diffraction Barrier

2010-06-04

arxiv.org/abs/1006.0799v1

Phys. Rev. Lett., vol. 104, pp. 203901 (2010)

Physics

Optics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.104.203901

We introduce the resonant metalens, a cluster of coupled subwavelength resonators. Dispersion allows the conversion of subwavelength wavefields into temporal signatures while the Purcell effect permits an efficient radiation of this information in the far-field. The study of an array of resonant wires using microwaves provides a physical understanding of the underlying mechanism. We experimentally demonstrate imaging and focusing from the far-field with resolutions far below the diffraction limit. This concept is realizable at any frequency where subwavelength resonators can be designed.

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