Research On The Surface Plasmon Resonance And The Photoelectric Properties Of Ag Nano‐meter Material

Surface plasma resonance is a unique optical property of nano-structured metals. The research on surface plasma in nanostructured metals has become one of the rapid development of international hot research fields, named plasmonics. By supporting the foundation of existing research at home and abroad, in combination with plasmonics and electromagnetic field theory, the photoelectric properties of silver nanomaterial and the control factors of surface plasma resonance were studied in this thesis. It provides a certain guid for nanophotonic devices, biological medicine and other fields.The main contents and the conclusions of this thesis are listed as follows:1. Established the analysis model of the interaction forces between silver nanoparticles. The influences of structure parameters such as the cross-sectional shape,dimension and the relative position of silver nanoparticles on the surface plasmon resonance and the interaction forces between two silver nanoparticles were analyzed in detail. Many interesting physical phenomena were discovered with the structure factors changing, such as the red-shift, blue-shift, degeneration, enhancement.2. The reasons of the interaction forces between Ag nanoparticles were investigated. When the incident light irradiated on silver nanoparticles, two resonant modes happened, that is local coupled resonant and self-guided coupled resonance.3. Established the analytical model of the photoelectric response characteristics of the silver nanometal resonator. It discussed the influence of the structure parameters of Ag nano-metal resonator on the interaction forces of Ag nanometal resonator in detail. It is found that the peak center positions of the interaction forces appeared red-shift, blue-shift. The peak values reduced, increased.4. The reason of the interaction forces changing with the space of the silver nano-metal resonator was discussed. As the space increased, the surface plasmon resonance weakened. There are many polarization surface charges reverse arranged on the silver nanometal resonator surface. The equivalent LC resonant circuit of the silver nanometal resonator was obtained.5. It made a further discussion of the derivation of inductance, capacitance and resistance of the equivalent LC circuit. The results showed that the inductance was concerned with the space of the silver nanometal resonator. The capacitance was limited by the length and the space of the silver nanometal resonator.6. Using the equivalent LC circuit, the formula that responsed the relationship between the resonant wavelength and the structure parameters of the silver nanometal resonator has been obtained. As the space of the silver nanometal resonator increased, or the length of the silver nanometal resonator reduced, the resonant wavelength of the silver nanometal resonator increased.7. Established the analysis model of the energy storage capability of Ag-Si grating solar cell. The application of the photoelectric conversion of the silver nanometal was studied. It discussed the influence of the shape and thickness of the silver nanometal electrode on the energy storage capability of Ag-Si grating solar cell in detail. Compared with Si grating solar cells, the energy storage capability of Ag-Si grating solar cell significantly increased. The energy storage effect of triangle Ag-Si grating solar cell was the strongest. The stored energy capability of Ag-Si grating solar cells increased with the silver nanometal electrode thickness after the first cut increased.