Sub-diffraction-limit Observation Realized by Nonlinear Metamaterial Lens

Details Sub-diffraction-limit Observation Realized by Nonlinear Metamaterial Lens Sub-diffraction-limit Observation Realized by Nonlinear Metamaterial Lens

2009-05-03

arxiv.org/abs/0905.0263v1

Physics

Optics

17 pages, 4 figures

Scientific paper

In this paper, we show by experiment that by covering a thin flat nonlinear lens on the sources, the sub-diffraction-limit observation can be achieved by measuring either the near-field distribution or the far-field radiation of the sources at the harmonic frequencies and calculating the inverse Fourier transformation to obtain the sub-wavelength imaging. Especially, the sub-wavelength image calculated from measured far-field data demonstrates very clear resolution. Since metamaterials included with active elements can easily behave strong nonlinearity under very weak incident electromagnetic powers, the application of the nonlinear lens proposed in this paper would have important potential in improving the sub-wavelength resolution in the near future.

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