TY  - JOUR
T1  - Spectral SPR effect in thin films of high-conductive metals and features of SPR-biosensors implementation in chromatic mode
AU  - O.L.Kukla
AU  - Yu.M.Shirshov
AU  - A.I.Biletskiy
AU  - O.N.Fedchenko
JO  - Semiconductor Physics, Quantum Electronics & Optoelectronics
VL  - 27
IS  - 4
SP  - 478
EP  - 488
PY  - 2024
DO  - 10.15407/spqeo27.04.478
UR  - https://doi.org/10.15407/spqeo27.04.478
AB  - In this paper, we have evaluated the application of various types of highly conductive metals for implementing the effect of spectral surface plasmon resonance (SPR) within a visible spectrum range to achieve more efficient and productive registration of biomolecules in a liquid medium using tricolor RGB cameras. Thin films of gold, silver, copper, and aluminum, as well as a bimetallic coating of silver with a gold superlayer on a glass substrate, are considered. Detailed calculations of the spectral characteristics of reflection at SPR excitation in the Kretschmann geometry are performed, particularly when a thin dielectric film is formed on the metal surface that imitates a layer of biomolecules. For each of the specified metals, the width of the region of implementation of the full-fledged SPR effect in the visible range of the spectrum is determined, and the sensitivity of the optical response to the influence of an external dielectric layer is assessed.
KW  - spectral SPR effect
KW  - chromatic mode
KW  - high-conductive metals
KW  - reflection spectra
KW  - R
KW  - G
KW  - B components
KW  - visible wavelengths range
ER  -