Multimode Surface Plasmon Excitations on Organic Thin Film/Metallic Diffraction Grating

Abstract

In this work, we demonstrate multimode surface plasmon (SP) excitations by white light irradiation on metallic diffraction grating/plastic substrates. Recordable compact discs were used as the diffraction grating substrates on which silver films were deposited by vacuum evaporation. Since the grating pitch (1.6 mm) was larger than that of diffraction gratings commonly used for the excitation of SPs, multimode SP excitations due to several diffraction orders were observed simultaneously in the wavelength region from 400 to 800 nm. The obtained SP excitations were then compared with the calculated SP dispersion on the grating. The multimode SP excitations were further studied on spincoated poly[2-methoxy-5-(2 0 -ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) thin film/silver grating substrates. An increased photoluminescence intensity due to SP excitations was observed on MEH-PPV/silver grating surfaces.

Controlling Surface Plasmon Optical Transmission with an Electrochemical Switch Using Conducting Polymer Thin Films

“…DVD‐R substrates were used either directly as grating substrates or templates for grating substrate imprinting. The use of grating surfaces on commercially available CD‐Rs, DVD‐Rs, and BD‐Rs is a convenient method of obtaining the grating‐coupled SPRs 18–21. A T‐SPR system was combined with an electrochemical setup to manipulate the resonance.…”

The effect of gold quantum dots/grating-coupled surface plasmons in inverted organic solar cells

“…When the GC-SPR was excited, a strongly enhanced electric field was generated near the Ag surface. The enhanced electric field from the GC-SPR enhanced the fluorescence if the fluorophore material was located within the GC-SPR evanescent field [ 32 ]. Figure 7 shows the fluorescence enhancement (p/s) at 510 nm of the G-AuQDs/PEDOT : PSS film deposited on flat Ag and G-AuQDs/PEDOT : PSS films coated on Ag-coated BD-R and DVD-R gratings under illumination at an excitation wavelength of 300–500 nm.…”

“…The enhanced fluorescence may have been due to the emission of GC-SPR excited by the G-AuQDs fluorescence, in addition to the G-AuQDs fluorescence itself. The fluorescent light from the G-AuQDs induced GC-SPR on the Ag surface, and the latter was able to emit from the surface because of the roughness of the Ag surface [ 32 ]. At above 40°, p/s on the BD-R grating was almost completely the same as that on the flat surface.…”

Simultaneous detection of ammonia and water vapors using surface plasmon resonance waveguide sensor

“…The use of a prism sometimes prevents the miniaturization of the sample and is not always desirable. Grating coupling [17][18][19] is known as a SP excitation method in which a prism is not needed but the preparation of a grating structure on the desired substrate surface is sometimes difficult.…”