TY - JOUR
T1 - Plasmonic properties of gold nanostructures on gold film
AU - Lequeux, Médéric
AU - Mele, David
AU - Venugopalan, Priyamvada
AU - Gillibert, Raymond
AU - Boujday, Souhir
AU - Knoll, Wolfgang
AU - Dostalek, Jakub
AU - Lamy De La Chapelle, Marc
PY - 2020
Y1 - 2020
N2 - This paper reports on a systematic study of the plasmonic properties of periodic arrays of gold cylindrical nanoparticles in contact with a gold thin film. Depending on the gold film thickness, it observes several plasmon bands. Using a simple analytical model, it is able to assign all these modes and determine that they are due to the coupling of the grating diffraction orders with the propagating surface plasmons travelling along the film. With finite difference time domain (FDTD) simulations, it demonstrates that large field enhancement occurs at the surface of the nanocylinders due to the resonant excitation of these modes. By tilting the sample, it also observes the evolution of the spectral position of these modes and their tuning through nearly the whole visible range is possible. Such plasmonic substrates combining both advantages of the propagative and localised surface plasmons could have large applications in enhanced spectroscopies.
AB - This paper reports on a systematic study of the plasmonic properties of periodic arrays of gold cylindrical nanoparticles in contact with a gold thin film. Depending on the gold film thickness, it observes several plasmon bands. Using a simple analytical model, it is able to assign all these modes and determine that they are due to the coupling of the grating diffraction orders with the propagating surface plasmons travelling along the film. With finite difference time domain (FDTD) simulations, it demonstrates that large field enhancement occurs at the surface of the nanocylinders due to the resonant excitation of these modes. By tilting the sample, it also observes the evolution of the spectral position of these modes and their tuning through nearly the whole visible range is possible. Such plasmonic substrates combining both advantages of the propagative and localised surface plasmons could have large applications in enhanced spectroscopies.
U2 - 10.1007/s11468-020-01185-9
DO - 10.1007/s11468-020-01185-9
M3 - Article
SN - 1557-1955
VL - 1
JO - Plasmonics
JF - Plasmonics
ER -