Design and Fabrication for Reflective-typewaveplate and Beam splitting waveplate

• Main Authors: Feng-Sheng Chou, 周峯聖
• Other Authors: 任貽均
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/56e646

碩士 === 國立臺北科技大學 === 光電工程系研究所 === 100 === In this work, an anisotropic film is applied to on a silver mirror to form the configuration (incident medium/ anisotropic thin film/silver mirror), to generate the broadband and wide angle phase retardation. According to this configuration, the polarization conversion is very high at small angle, which act as a reflective-type polarization converter. Experimentally we apply the oblique angel deposition technique to fabricate the anisotropic Ta2O5 film. By changing the different thickness from 1400nm to 2600nm and varied deposition angle of Ta2O5 biaxial film to modify it’s optical properties, and study the polarization conversion of it. Theoretically, we use the Berreman calculus to gradually analyze the eigen-waves that propagate within an anisotropic Ta2O5 film to demonstrate phase retardation can be achieved by the propagation and reflection of eigen-waves from the silver surface. Base on the theory, we can design and manufacture the broadband and wide angle reflective-type polarization converter in the visible regime. Base on the design methods of reflective-type waveplate and beam splitter, we develop a novel optical device called beam splitting waveplate.