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14 December 2010Transparency and super-resolution in metal-dielectric layered structures
A carefully designed metal-dielectric periodic stack forms a simple optical metamaterial with small losses and
super-resolving properties for imaging between its external boundaries in the near-UV or visible wavelength
range. The effective penetration depth reaches the order of one micrometer with the resolution even tenfold
better than predicted by the Rayleigh criterion in air. Therefore the stack may be seen as a transparent and
super-resolving metamaterial. Depending on the strength of Fabry-Perot resonances it may either support
standing-wave internal field distributions or allow for approximately diffraction-free propagation not limited to
any specific beam profiles. The latter case enables to design shaped elements such as prisms, or elements of optical
cloaks which retain the same diffraction-free properties. Here an overview of the physical models which explain
the super-resolution is presented - in particular with reference to the effective medium theory. The numerical
simulations are based on the transfer matrix method. A discussion on the analogies between subwavelenegth
imaging with metal-dielectric multilayers and isoplanatic imaging systems considered in the past within the
framework Fourier Optics is included.
"Transparency and super-resolution in metal-dielectric layered structures", Proc. SPIE 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 774605 (14 December 2010); https://doi.org/10.1117/12.882139
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Rafal Kotynski, "Transparency and super-resolution in metal-dielectric layered structures," Proc. SPIE 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 774605 (14 December 2010);