Research output: Contribution to journal › Conference article › peer-review
The evidence of the role of surface plasmon polaritons in formation of femtosecond highly-regular laser-induced periodic structures on Cr films. / Dostovalov, A. V.; Derrien, T. J.Y.; Preucil, F. et al.
In: Journal of Physics: Conference Series, Vol. 1092, 012025, 01.01.2018.Research output: Contribution to journal › Conference article › peer-review
}
TY - JOUR
T1 - The evidence of the role of surface plasmon polaritons in formation of femtosecond highly-regular laser-induced periodic structures on Cr films
AU - Dostovalov, A. V.
AU - Derrien, T. J.Y.
AU - Preucil, F.
AU - Mocek, T.
AU - Korolkov, V. P.
AU - Babin, S. A.
AU - Bulgakova, N. M.
N1 - Conference code: 3
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Cr films of controlled thickness deposited on glass substrates were irradiated by a high number of low-intensity femtosecond laser pulses below the Cr single-pulse damage threshold, producing periodic surface structures (LIPSS) of very high regularity via metal oxidation. To address the multiplicity of electromagnetic modes allowed for thin films, a rigorous numerical approach for modeling surface plasmon polaritons (SPP) in thin-film geometry has been developed. Three types of modes are predicted: the classical SPP with periodicities Λ ~ λ (λ Is laser wavelength) at air-film interface, and ? ~ ?/n at film-substrate interface (n is refractive index of substrate), and a propagation mode ? ~ ?/nCr where nCr is refractive index of film material. Experimentally observed LIPSS periods match well the predicted modes for the extreme cases, ? ~ ?/n at film thickness h = 30 nm and ? ~ ? At h = 200 nm, indicating respectively the dominance of SPP excited at the film-substrate interface and at the metal surface. For 30 nm < h < 200 nm, decreasing of the film thickness results in transition from the pure surface mode to its coupling with and finally domination of the electromagnetic wave excited at the film-substrate interface, providing evidence of the SPP mechanism of LIPSS formation under laser irradiation of thin metallic films.
AB - Cr films of controlled thickness deposited on glass substrates were irradiated by a high number of low-intensity femtosecond laser pulses below the Cr single-pulse damage threshold, producing periodic surface structures (LIPSS) of very high regularity via metal oxidation. To address the multiplicity of electromagnetic modes allowed for thin films, a rigorous numerical approach for modeling surface plasmon polaritons (SPP) in thin-film geometry has been developed. Three types of modes are predicted: the classical SPP with periodicities Λ ~ λ (λ Is laser wavelength) at air-film interface, and ? ~ ?/n at film-substrate interface (n is refractive index of substrate), and a propagation mode ? ~ ?/nCr where nCr is refractive index of film material. Experimentally observed LIPSS periods match well the predicted modes for the extreme cases, ? ~ ?/n at film thickness h = 30 nm and ? ~ ? At h = 200 nm, indicating respectively the dominance of SPP excited at the film-substrate interface and at the metal surface. For 30 nm < h < 200 nm, decreasing of the film thickness results in transition from the pure surface mode to its coupling with and finally domination of the electromagnetic wave excited at the film-substrate interface, providing evidence of the SPP mechanism of LIPSS formation under laser irradiation of thin metallic films.
UR - http://www.scopus.com/inward/record.url?scp=85056235743&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/419a57a7-3d16-38ed-8cd1-42ed226d8d14/
U2 - 10.1088/1742-6596/1092/1/012025
DO - 10.1088/1742-6596/1092/1/012025
M3 - Conference article
AN - SCOPUS:85056235743
VL - 1092
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012025
T2 - 3rd International Conference on Metamaterials and Nanophotonics
Y2 - 17 September 2018 through 21 September 2018
ER -
ID: 17408757