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The ability for surface-enhanced Raman spectroscopy (SERS) study of fluorescent – rhodamine 6G (R6G) and methylene blue (MB) – as well as nonfluorescent (coconut milk) probing chemicals with 355 nm excitation wavelength was demonstrated according to our knowledge for the first time. Aluminum nanostructures (NSs) arrays used were produced by direct pulsed deposition either with ps laser on fused silica substrate or with ns laser decomposition of AlN ceramic surface – all active substrates were produced for the first time. The efficiency of the Al active nanostructures produced on AlN for 355 nm SERS was simulated using the finite difference time domain (FDTD) method. 355 nm SERS was used as an alternative instead of excitation with more high-energetic ultraviolet (UV) or deep ultraviolet (DUV) wavelengths. The increase of the sensitivity of the active alumina substrates was discussed.

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  © Union of the Physicists in Bulgaria (UPB)

Keyword: 55 nm SERS, Al active nanostructures, AlN decomposition, FDTD simulations, R6G, MB, coconut milk

Date published: 2025-12-28

Publisher: Union of Physicists in Bulgaria

Journal:

• Bulgarian Journal of Physics vol. 52 issue. 4 p. 422-434

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6283

First published URL: https://doi.org/10.55318/bgjp.2025.52.4.422

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Updated at: 2026-05-12 11:01:23 +0900

Published on MDR: 2026-05-12 12:26:59 +0900