High transmission efficiency for surface plasmon resonance by use of a dielectric grating.
The efficiency of the transmission of surface plasmon waves by use of a dielectric diffraction grating is discussed. The Kretschmann device allows us to obtain a surface plasmon resonance that consists of an absorption peak in the reflection spectrum. When surface plasmon resonance occurs, the TM-polarization mode of the incident electromagnetic wave is neither transmitted nor reflected. The procedure to transform an 4bsorption peak into a transmission peak is described. Transmittivity of 68% is obtained for a simple structure that consists of a thin-film layer of Ag coated on a volume diffraction grating and embedded between two dielectric media. The results presented herein were obtained by numerical simulations that were carried out by use of an algorithm based on the rigorous coupled-wave theory.
Lenaerts
Cédric
C
Hololab, Department of Physics, University of Liège, Allée du 6 août, Bâtiment B5a, 4000 Liège, Belgium. cedric.lenaerts@ulg.ac.be
Michel
Fabrice
F
Tilkens
Bernard
B
Lion
Yves
Y
Renotte
Yvon
Y