Multiscale analysis of subwavelength imaging with metal-dielectric multilayers

Details Multiscale analysis of subwavelength imaging with metal-dielectric multilayers Multiscale analysis of subwavelength imaging with metal-dielectric multilayers

2009-08-31

arxiv.org/abs/0908.4532v2

Opt. Lett. 35 (8), 1133-1135 (2010)

Physics

Optics

3 pages, 5 figures,

Scientific paper

10.1364/OL.35.001133

Imaging with a layered superlens is a spatial filtering operation characterized by the point spread function (PSF). We show that in the same optical system the image of a narrow sub-wavelength Gaussian incident field may be surprisingly dissimilar to the PSF, and the width of PSF is not a straightforward measure of resolution. FWHM or std. dev. of PSF give ambiguous information about the actual resolution, and imaging of objects smaller than the FWHM of PSF is possible. A multiscale analysis of imaging gives good insight into the peculiar scale-dependent properties of sub-wavelength imaging.

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