| Summary: | 碩士 === 國立臺灣大學 === 材料科學與工程學研究所 === 95 === In recent years, surface plasmon resonance was widely studied and discussed since the unique optical property can be used for designing advanced optical devices, and transmission can be dramatically enhanced to several times when normalized by the hole area in structure with sub-wavelength hole arrays. Different period, hole size, hole shape, even holes arrangement in structures of periodic arrays are discussed in this thesis. Devices with multiple transmission bands are designed in three ways: intermixture, mixture, and remotely couple surface plasmons. The detail of each method is investigated, and not only the optical transmission but also the polarization-sensitive behaviors are discussed. Furthermore, a new method to measure surface plasmon resonance by utilizing ellipsometer is proved to be feasible.
In spite of the planar structure of hole arrays devices, we also fabricate the three-dimensional structure of hole arrays and gratings with good spatial alignment by inserting an align mark on the substrate. It is showed that in multiple-layers structure, the optical behavior is greatly influenced by the spatial relationship between each layer, and the transmission intensity is much higher in some special condition.
Surface plasmons-based applications, color filter and sensor, are introduced in the end of the thesis. By altering structure parameters of hole arrays, period, hole size and shape, thickness of metal film, we can control three main attributes of perceived color, Hue, lightness, and chroma respectively. In addition to sense the different material by transmission maximum in spectra, which can only do qualitative analysis, a much more accurate method, which can do both qualitative analysis and quantitative analysis by utilizing Wood’s anomaly, are proposed and examined in experiment and simulation.
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