New SERS-active junction based on cerium dioxide facet dielectric films for biosensing

Further enhance of the Raman scattering is the priority for the development of the modern molecular diagnostic methods. Expected increasing in detection sensitivity of the biological and chemical agents provides substantial progress in such areas as: proteomics (discovery of new disease markers), pharmacokinetics of drugs, analysis of toxins and infections agents, drug analysis, food safety, and environmental safety. In this paper we investigated the possibility of the facet structures, based on cerium dioxide to further enhance the SERS signal. During the studies a new metamaterial was developed. The metamaterial is based on the facet cerium dioxide films and plasmonic nanoparticles that are immobilized on its surface. The new metamaterial provides additional SERS signal amplification factor of 211. Thus developed material offers the prospect of increasing the sensitivity and selectivity of biochemical and immunological analysis

The field enhancement and optical sensing in the periodic and quasi-periodic structures.

New class of the dielectric metamaterials is proposed. We consider both periodic and quasi-periodic structures consisting of the arrays of the almost adjoining dielectric nanorods and the arrays of the dielectric bars at the metal substrate. We obtain a multiple internal resonances, exited by the incident wave, at optical and microwave frequencies. The interaction of such resonances results in giant electric and magnetic field fluctuations