Three dimensional subwavelength focus by a near-field plate lens
Authors:
- 10 June 2013
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 102 (23) , 231119
Abstract
We implemented the inverse design method to build a thin near-field lens that could produce a desired subwavelength focus by manipulating the near fields of a magnetic dipole source. The flat near-field lens represented by an artificial impedance surface was fabricated by lumped reactive elements (capacitor and inductor) with spatially varying values. In the experiment, a desired annular focusing spot with a characteristic size nearly three times smaller than that allowed by the diffraction limit was obtained. Besides high-resolution imaging, the proposed near-field plate could be extended for other interesting applications, such as wireless power transfer or complex wavefront/beam shaper.Keywords
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This publication has 27 references indexed in Scilit:
- Broadband Focusing Flat Mirrors Based on Plasmonic Gradient MetasurfacesNano Letters, 2013
- High-Efficiency Broadband Anomalous Reflection by Gradient Meta-SurfacesNano Letters, 2012
- Aberration-Free Ultrathin Flat Lenses and Axicons at Telecom Wavelengths Based on Plasmonic MetasurfacesNano Letters, 2012
- Giant birefringence in optical antenna arrays with widely tailorable optical anisotropyProceedings of the National Academy of Sciences, 2012
- Wave front engineering from an array of thin aperture antennasOptics Express, 2012
- Reconciliation of generalized refraction with diffraction theoryOptics Letters, 2012
- Out-of-Plane Reflection and Refraction of Light by Anisotropic Optical Antenna Metasurfaces with Phase DiscontinuitiesNano Letters, 2012
- Broadband Light Bending with Plasmonic NanoantennasScience, 2012
- Manipulating light polarization with ultrathin plasmonic metasurfacesPhysical Review B, 2011
- Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and RefractionScience, 2011