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Near-Field Microscopy with Superlenses

Sub-Wavelength Resolution in the IR Using Perovskite Oxides

Feb. 06, 2012
Fig. 2: Near-field images. (a) For SrRuO3 objects on a SrTiO3 substrate we image near-field signals using a CO2 laser (λ = 10.6). The objects appear bright, which certain maxima due to plasmonic excitation related to the geometry of the structure. (b) On the superlens we observe a contrast beyond the diffraction limit for λ = 14.6 μm. Here, the objects appear equally bright, due to details in the illumination [9]. (scalebars are 10 μm).  Figure adapted from [9]. Reprinted with permission from Nature Communications, Copyright (2011) [9].
Fig. 2: Near-field images. (a) For SrRuO3 objects on a SrTiO3 substrate we image near-field signals ... more
Fig. 2: Near-field images. (a) For SrRuO3 objects on a SrTiO3 substrate we image near-field signals ... Fig. 1: Sketch of the near-field setup including the superlens and the geometry at the near-field ... Fig. 3: Spectral response of the symmetric superlens. Near-field spectrum as well as near-field ... Fig. 4: Normalized cross sections on an asymmetric superlens without the top-layer of BiFeO3. The ... 

Keywords: Metamaterials Near-field Microscopy Perovskite Oxides Sub-wavelength Imaging superlens

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