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In the present study, the interaction of optical radiation with a system of periodically arranged gold and silver nanowires of the square cross-sections on the dielectric substrate has been analyzed. The spectral character of the absorption, reflection and transmission at the interaction of the optical wave with nanogratings based on gold and silver is qualitatively and quantitatively different. It...
A results of numerical analysis RCWA diffraction by metal gratings under plasmon resonance are presented. Numerical experiments show low convergence of traditional RCWA for such types of the resonances of electromagnetic field. Modified RCWA for studying resonance diffraction phenomena on metal gratings was proposed. Dielectric permittivity functional dependence of grating as complex Fourier series...
Results of modeling gold-coated polycarbonate grating-based substrates for Raman spectroscopy are presented. Polycarbonate diffraction gratings were fabricated by hologram replication technology and gratings surfaces were covered by gold layer using vacuum deposition method. The morphology of ťhe SERS substrates is characterized by scanning electron microscopy and atomic force microscopy. The results...
This work presents research of the sensors element refractive index. Presented sensor element consists of the one-dimensional relief Au-coated GaAs grating. The grating parameters have been optimized to maximize angular sensing signal using RCWA method. High sensitivity due to plasmon polariton resonance was observed under TM polarization. The optimized grating was manufactured using method of photo...
In this paper the spectral properties of silver nanoparticles and titanium oxide-silver nanoshells have been studied. Dependences surface plasmons resonance peak of the nanoshells from particle size and refractive index of the surrounding medium are researched.
We describe optical sensors based on the waveguide resonance phenomenon which allow for label-free detection of thin layers of varying refractive index. We present a design for sensor which can perform real-time analysis.
The five-layer structure of dielectric interference filter for the infra-red region of spectrum was researched. The refractive indices optimal and thicknesses of individual layers are obtained for thin-film filter with interference mirror.
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