Transmission light property due to grating-coupled long-range surface plasmon resonance

Abstract

Transmission light property due to surface plasmon resonance (SPR) was investigated for glass substrate/500-nm-thick fluoropolymer (CYTOP) with a grating structure/thin metal film/mixed solution of water and glycerol system. Transmission light peaks were observed due to grating-coupled SPR, with a remarkable peak intensity when pure water exists as an ambient dielectric. CYTOP exhibits a refractive index close to that of water, and the remarkable peak intensity was attributed to long-range SPR. The monitoring of polyelectrolyte layer-by-layer film deposition using transmission light was also investigated.

Evaluations of ethylene glycol and polyethylene glycol aqueous solutions using a hybrid sensor of surface plasmon resonance and quartz crystal microbalance

“…The CYTOP and aqueous solution exhibit similar refractive indices. In this case, the surface plasmons at the interfaces at CYTOP/metal and metal/aqueous solution combine, and a long-range SPR (LRSPR) 12) can be induced. The experimental wavenumber k exp and angular frequency ω exp for SPR were calculated using the following equations:…”

“…Furthermore, a light transmission can be used to observe SPR as shown in Fig. 1(b) (hereafter, referred to as the T-SPR [11][12][13] measurement). This allows for a more simple measurement setup than the prism coupling method since only the incident angle must be controlled for.…”

Long-range surface plasmon resonance enhanced transmission of light through silver-coated Cytop gratings

“…1) This phenomenon was also observed from metal-coated grating structures. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] The extraordinary transmission of light through these metal-coated nanostructures results from a strong electric field of the SPR that is highly sensitive to local dielectric properties of materials adjacent to the metal surface. The strong and narrow transmission peaks were observed and could be tuned over a wide wavelength range (visible to near-infrared light region).…”

“…[29][30][31][32][33][34][35] The LRSPR was first observed in 1981 and subsequent studies shown that LRSPR could be produced from several different types of structures and light configurations including transmission light configuration. 10,29,[36][37][38][39][40] A metalcoated Cytop grating/glass slide substrate with Cytop thickness about 500 nm showed much stronger in transmitted light intensity compared with that of the substrate without Cytop and this substrate could be utilized for investigation of the thickness of thin polymer film. 10) In this work, we investigated the TSPR tuning of metalcoated Cytop grating/glass slide substrate by changing the thicknesses of Cytop and metal films.…”

Ammonia Gas Detection under Various Humidity Conditions Using Waveguide Surface Plasmon Resonance Spectroscopy

“…Therefore, a surface plasmon resonance (SPR) technique is frequently employed in the development of sensitive sensors of bio-and gas-molecular adsorptions. [14][15][16][17][18][19] SP is a coupling mode of a light and corrective oscillation of surface free electrons, and the SP excitation condition must be fulfilled for observation. SP excitation is commonly conducted by a Kretschmann configuration, 1 like a glass prism, metal film, and dielectric film structure.…”