2009/05/03 by Zhiyu Wang, Yu Luo, Wang, Zhiyu +13
Engineering · Materials Science · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #FOS: Physical sciences #Liquid Crystal Research Advancements #Metamaterials and Metasurfaces Applications #Optics (physics.optics) #physics.optics
paper · pdf · doi:10.48550/arxiv.0905.0263
17 pages, 4 figures
arxiv created 2009/05/03 · openalex publication_date 2009/05/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.