Imaging in the visible wavelength range through anisotropic layered flat lens operating in the canalization regime

Anna Pastuszczak; Rafal Kotyński

doi:10.1117/12.821676

12 May 2009 Imaging in the visible wavelength range through anisotropic layered flat lens operating in the canalization regime

Anna Pastuszczak, Rafal Kotyński

Author Affiliations +

Proceedings Volume 7353, Metamaterials IV; 735319 (2009) https://doi.org/10.1117/12.821676
Event: SPIE Optics + Optoelectronics, 2009, Prague, Czech Republic

Abstract

We investigate the tunneling of visible light through silver-dielectric superlenses working in the canalization regime. These structures feature high transmission and a sub-wavelength point spread function. They may serve as a novel element for mode coupling between ordinary waveguides, photonic crystal waveguides and plasmonic waveguides. We discuss the accuracy limits of homogenisation originally used in the definition of the canalisation regime. For this purpose we determine the actual anisotropic effective material parameters of the stack and compare them to those predicted by the effective medium theory. Further we optimise the structure with respect to the rigorously calculated transmission properties, rather than using the effective medium theory. Our analysis is based on the transfer matrix method formulated for multilayers with complex and uniaxially anisotropic permittivity and permeability tensors. The method does not assume the quasi-static approximation, retains validity for evanescent waves, and allows for including losses and dispersion into calculations.

Citation Download Citation

Anna Pastuszczak and Rafal Kotyński "Imaging in the visible wavelength range through anisotropic layered flat lens operating in the canalization regime", Proc. SPIE 7353, Metamaterials IV, 735319 (12 May 2009); https://doi.org/10.1117/12.821676

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