Leelawattananon, Tanaporn
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Preferred name
Leelawattananon, Tanaporn
Alternative Name
Leelawattananon, Thanaporn
Main Affiliation
Email
tanaporn.le@kmitl.ac.th
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Item type:Publication, Silver thin film and water dielectric SPR sensor experimental and simulation characteristics(2019-01-01); Chittayasothorn, SuphamitThis research project is the study of the Surface Plasmon Resonance (SPR) at the interface between silver thin film and the water dielectric layer. The purpose is to find the suitable thickness of the silver thin film layer which produces SPR and is suitable for SPR sensor applications. Both physical experiments and simulations are conducted using the Kretschmann Configuration. In the physical experiments, BK7 prisms are coated with silver thin films with the thickness of 60Â nm, 80Â nm, and 100Â nm. The light source is p-polarized He-Ne Laser with the wavelength of 632.8Â nm. Hawkeye laser detectors are used to detect the laser light intensity of reflected light for each desired angle. In the simulations, results of SPR signals are analyzed using the finite element method. The simulated results are found to agree with the results from the physical experiments. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Simulation of Surface Plasmon Waves Based on Kretschmann Configuration Using the Finite Element Method(2019-01-01); Chittayasothorn, SuphamitThis paper presents the simulation of optically activated surface plasmon waves based on Kretschmann configuration by using prism. Simulated electric fields of the surface plasmon wave which appears at the interface between the metal thin film and dielectric layer are observed. The occurences of surface plasmon wave can be applied to biomolecular sensing and high speed data communications at the THz level. The simulations employ the finite element method (FEM). The light source is the 632.5 nm red laser which is economical and easy to obtained commercially. Two simulation models are conducted. The first simulation model employs copper thin film on the prism and air as the dielectric layer. This one is intended to find the most suitable copper thin film thickness to produce surface plasmon waves. Copper thin film is used because it is a noble metal which is less expensive than gold but has better conductivity than gold. The second simulation model employs silver, another noble metal which is also less expensive than gold. Silver thin film on prism together with magnesium chloride solution as dielectric layer are simulated. Concentrations of the magnesium chloride solution are varied to find the one which produces good surface plasmon wave pattern. Thus suitable to be used as sensors for biomoleculars such as DNAs.