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Scanning near-field optical microscopy (SNOM) is an important tool for measurements of nanostructures as well as chemical and biosensing applications. A key parameter defining its usefulness is its resolution which depends of the geometrical size of SNOM probes and signal throughput in aperture tips and signal enhancement in apertureless ones. We analyse nanofocusing properties of an apertureless...
In this communication we present technical details of performance of recently proposed silver nanolens which transforms a far-field source into a far-field focus [P. Wrobel, J. Pniewski, T.J. Antosiewicz, T. Szoplik, ldquoFocusing radially polarized light by concentrically corrugated silver film without a holerdquo Phys. Rev. Lett., in print (2009)]. The nano-lens is a free standing silver nanolayer...
A metamaterial composed of electromagnetically active cells with two parallel wires of sub-wavelength size can be fabricated by means of patterning techniques used in microelectronics. Intensity transmittance of layered metamaterial is assessed as a function of fill factor, that is a ratio of wire to layer surfaces, that in simulations changes from 6 to 20%. Negative refractive index reaching as low...
Current interest in photonic nanodevices motivates search for efficient transport of energy in plasmon waveguides. Chains of nanoelements made of noble metals guide light in channels of below-the-diffraction-limit size due to surface plasmon coupling. We calculate attenuation factors in a chain of parallel pairs of nanoplates for visible and near infrared range of wavelengths. Nanoplates are embedded...
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