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The modulation of the shape of the metal nano- particles on the surface plasmon resonance characteristics of

Author: ZhangMeiJing
Tutor: ZhouXiuLi
School: University of Electronic Science and Technology
Course: Optics
Keywords: Metal nano-particles Surface -enhanced Raman scattering Nano ellipsoid hole FDTD method
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 348
Quote: 1
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Abstract


The optical properties of metal nanoparticles and their applications in surface-enhanced Raman scattering (SERS) effect is a hot topic in today 's nanoscience research . The metal nanoparticles Unlike bulk materials , due to the special structure of the nanomaterials cause it has a lot of special effects : the quantum size effect , small size effect and surface effect , these basic properties of the metal nanoparticles have unique optical properties - surface plasmon resonance. By controlling the size , morphology and structure of metal nanoparticles , the surface plasmon resonance peak position can be adjusted so that it has a broad application prospects in many fields . The center of the paper work is theoretically quantitative study linear optical properties of non- spherical metal nanoparticles and their arrays , and study the impact of particle shape , size and dielectric environment of the optical properties , and to explore Closely related to this the surface -enhanced Raman scattering effect of the electromagnetic field enhancement mechanism . The main contents include the following three aspects: 1 . Based on metal nanoparticles surface plasmon resonance characteristics , with the help of three-dimensional time-domain finite difference method to study the transmission characteristics of the gold film with an array of nanopores and research the array cycle and the nanopore the impact of the shape of its transmission efficiency , the results show that this particular transmission effect is mainly caused by the the local waveguide effect and surface plasmon resonance effect , provided the conditions for the filter design . 2 by means of three-dimensional finite-difference time-domain method to study the optical properties of diamond and cross star array , as well as particle size , shape , surrounding dielectric environment and array cycle its optical properties , and summed up its variation . 3 by means of three-dimensional finite-difference time-domain method to calculate the surface electric field distribution of the nanoparticles and the maximum electric field enhancement factor , taking into account the particle size, shape, mutual coupling of surface-enhanced Raman scattering enhancement , and to explore recent years the nanoparticle aggregates particular concern for those with particularly high surface -enhanced Raman scattering enhancement factor of the \

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