Micro-Nano Processing Synthetic Gold Nanowire Propagation Properties

Nanometer scale photoelectric integrated device has become a popular research direction of nano Photonics recently. Metallic nanowires are highly promising candidates for plasmonic waveguides in photonic and electronic devices, so the metallic nanowires propagation have become hot research content of nanometer material science。The core research of this thesis is Surface plasmon propagation in gold nanowire, which is synthesized by micro-nano processing, We observe light from one end of a gold nanowire, following excitation of plasmons at the other end of the stripe with the785nm laser. The main contents can be divided into three parts, addition of nanometer materials and surface plasmon polaritons are briefly introduced.The first part of the thesis is to study how to synthesis gold nanowire by micro-nano processing. In this part, we introduce all kinds of technology that we need and we gives the gold nanowire fabrication steps and each steps details. The second part is about the characterization of gold nanowire, as our main research is gold nanowire’s conductivity, so we pay more attention to the structure and surface morphology of gold nanowire, therefore we using scanning electron microscopy and atomic force microscopy to study the surface characteristics of gold nanowire. The third part is about the gold nanowire conduction study, including gold nanowire size and the polarization of the incident light efficiency to gold nanowire propagation.In this paper, we give the specific steps to synthesis gold nanowires by micro-nano processing, with a high reference value for the production of complex nanostructures. On the gold nanowires propagation study, we find that, when the intensity of the incident light and incident light polarization invariable, the exit end of the light intensity on the wide nanowire is high than that on the narrow, thus, we can conclude that the wide gold nanowires progagation efficiency is higher than the sorrow nanowires. In the same condition, the light intensity of exit end as the nanowire growth weakens, so surface plasmon attenuated as it propagating in the nanowire. When the polarization direction of the incident light parallel to gold nanowire, gold nanowire exit end of the light intensity with the weakest, as the direction of polarization of incident light and gold nanowire angle increases, exit end of the light intensity increasing. When the polarization direction of the incident light and gold nanowire angle is90degrees, emergent light intensity reaches the maximum. This means that when the polarization of the incident light parallel to the gold nanowire,gold nanowire propagation efficiency is the lowest, when the polarization direction of the incident light and gold nanowires are vertical,the efficiency is the highest. The above conclusions play a great role in guiding for study of complex nano waveguide devices, and provide some experimental basis for study of all-optical devices.