Simulated Optical Properties Of Noble Metal/AAO Nano-arrays Composite Structure

The dissertation, after a brief introduction of the basic concepts, the development history and the latest investigation about nanomaterials and nanostructures, mainly focus on my research work of the theoretical simulated optical properties of noble metal/AAO nano-array composite. Some important results are obtained as following:1. The optical transmittance properties of AAO template are simulated by using effective medium theory. The simulated results show that AAO template has large transmittance in visible and short infrared region. Furthermore, the theoretical simulation results have also agreement with the experimental results.2. Ag/AAO nanocomposite is prepared by electrochemistry method, which has nano-ordered pore. Because of dispersion in the lengths of Ag foundations, the Ag nano-cylinders are scattered somewhat relative to the membrane face. The microcylinder can be modeled as three layer model. By using Maxwell-Garnett effective medium theory , the optical properties of Ag/AAO nanocomposite have been studied, The results show that the optical constants of Ag/AAO nanocomposite strongly depends on the Ag volume fraction. Furthermore, there are great influence of the aspect ratios of Ag nanowires on the surface plasmon resonance absorption (SPRA) of Ag nanowires. The simulated transmittance of Ag/AAO nanocomposite is also well agreement with the measured.3. By using Maxwell-Garnett effective medium theory, the optical constants of Au/ AAO nano-ordered arrays composite have been simulated. The dependency of the refractive index n and the extinction coefficient k of nanocomposite on the volume fraction and the aspect ratios of Au nanoparticles have been studied, respectively. The simulated results show that the optical constants n and k of Au/AAO nanocomposite strongly depend on the volume fraction and the aspect ratios of Au component. Furthermore, the influence of the volume fraction of Au component on the reflection and absorption of Au/AAO composites have also been studied, the results also show some similar pertinence.