File:Adiabatic-far-field-sub-diffraction-imaging-ncomms8942-s2.ogv

Summary

Description
English: Supplementary Movie 1 This video illustrates how surface waves interfere and form a super-resolution image of a point source. The structure consists of a lossless metal sphere (dielectric constant of ε=-2+0.01i, and permittivity μ=1) with diameter of 2μm placed 5nm above an infinite large lossless metal plate. A point dipole source is placed in the gap, 16nm away in X direction away from the center of the gap. The polarization of the dipole is in Z direction. A Finite-Time-Domain-Difference (FDTD) method is used for the simulation. The highest frequency used in the simulation corresponds to light with wavelength of 500nm in vacuum. The video shows a XZ cross-section plot of the intensity of all polarizations components of the E field. One can see that the surface waves propagate from the bottom of the sphere to the top. A white line marks the North Pole. The most constructive interference appears near the North Pole, forms an image of the point source. One may also notice that the adiabatic decompression process from the increasing wavelength of the surface waves. Even though the point source is only 16nm away from the South Pole of the sphere, which is well below the resolution limit. The displacement of this point source is clearly resolvable at the North Pole, illustrating the super-resolution power.
Date
Source Video file from Cang H, Salandrino A, Wang Y, Zhang X (2015). "Adiabatic far-field sub-diffraction imaging". Nature Communications. DOI:10.1038/ncomms8942. PMID 26258769. PMC: 4839783.
Author Cang H, Salandrino A, Wang Y, Zhang X
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Category:Optical imaging Category:Media from Nature Communications Category:Uploaded with Open Access Media Importer Category:Uploaded with Open Access Media Importer and needing category review Category:Videos from open-access scholarly articles Category:Video display resolution 320 x 240 Category:Ogv videos Category:Finite-difference time-domain method Category:Videos of optics
Category:CC-BY-4.0 Category:Finite-difference time-domain method Category:Media from Nature Communications Category:Ogv videos Category:Optical imaging Category:Uploaded with Open Access Media Importer Category:Uploaded with Open Access Media Importer and needing category review Category:Video display resolution 320 x 240 Category:Videos from open-access scholarly articles Category:Videos of optics