Simulation of the photonic nanojet effect for Raman scattering enhancement in the diagnostics of oxide films
| Autor: | A I Ivanina, D S Agafonova, N V Roshina, I A Lamkin |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Physics: Conference Series. 2086:012146 |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/2086/1/012146 |
| Popis: | In this paper, by means of numerical simulations in the COMSOL Multiphysics software it’s demonstrated that Raman scattering enhancement can be achieved for the diagnosis of metal oxide films using spherical particles made of barium titanate with a 10-micron diameter sphere. The formation of photonic nanojet in the sphere/film/substrate system at different radiation wavelengths and microsphere refractive index, film, and substrate was studied. The optimal interval of the particle refractive index is n≈1.8-2 was determined, at which the gain occurs directly at the particle/film interface. It is shown that for the UV wavelength range of wavelengths and film thicknesses from 50 to 200 nm, the gain is maximum. For ZnO and PZT films in the perovskite phase, sitall and quartz are preferred as the substrate material, while for PZT in the pyrochlore phase, sapphire is preferred. |
| Databáze: | OpenAIRE |
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