Pupil engineering and its applications to surface plasma resonance
碩士 === 國立交通大學 === 顯示科技研究所 === 100 === In the diffraction theory, scalar diffraction theory is based on specific conditions such as low numerical aperture. The electromagnetic fields are treated as the scalar components to obtain a good approximation by relatively simple mathematics formula. However,...
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| Format: | Others |
| Language: | en_US |
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2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/69258723295787229590 |
| Summary: | 碩士 === 國立交通大學 === 顯示科技研究所 === 100 === In the diffraction theory, scalar diffraction theory is based on specific conditions such as low numerical aperture. The electromagnetic fields are treated as the scalar components to obtain a good approximation by relatively simple mathematics formula. However, it is necessary to use high numerical aperture in many optical systems while the technology was fast developed. Meanwhile, the approximation of scalar diffraction is so unsuitable that we have to use the vector diffraction theory. The Three Dimensional Point Spread Function (3D PSF) is not only dominated by amplitude and phase but polarization of pupil function in vector diffraction theory.
In this thesis, we first study the relationship between pupil function and point spread function. Different kinds of pupil mask will be introduced in chapter 2. Then we discuss different polarized fields and use radial polarization to excite Surface Plasma Resonance (SPR). A new method is proposed to generate a spatially inhomogeneous polarized beam so that a chromatic SPR can be excited in the objective-based setup. Finally, we add a metal-insulator-metal coupler to enhance the performance of this chromatic SPR sensor.
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