High transmission efficiency for surface plasmon resonance by use of a dielectric grating

Abstract

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.

Sensitivity‐enhancement methods for surface plasmon sensors

“…By using the Kretschmann configuration with a dielectric grating on a silver film, an outcoupling efficiency of 50% was presented and proved experimentally by Park et al [65], 68% was obtained by Lenaerts et al [66], and even 72% was predicted numerically by Shen et al [67]. Numerical investigation of the transmission-type SPR sensor with dielectric and metallic gratings was done by Byun [68] and coworkers.…”

Transmission-type SPR sensor based on coupling of surface plasmons to radiation modes using a dielectric grating

“…Also, the resonance angle increases monotonically with grating thickness as the change in d g causes the local effective index to increase effectively. Results of approximately 68% of transmittance can be found in the literature for similar systems [11].…”

“…An outcoupling efficiency of 50% was presented and proved experimentally by the use of a conventional Kretschmann configuration and a dielectric grating on a silver film. From the report of Lenaerts et al [11], transmittance of 68% was obtained for a modified structure in which a waveguide grating was added between a metal surface and air. Such gratings are composed of two kinds of dielectric material, which will intent the complexity of the fabrication process.…”

Propagation of Electromagnetic Waves in Thin Dielectric and Metallic Films

“…These abrupt changes in DE led researchers to design and investigate resonant filters for applications in many devices including gratings. Rigorous coupled wave analysis (RCWA) has been used extensively (Moharam et al, 1995;Lalanne & Morris, 1996;Lenaerts et al, 2005) to calculate diffraction efficiencies (DE) in waveguide structures. The application of RCWA to resonant-grating systems has been investigated mostly for both the TE and TM polarization.…”