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Research on Propagation Properties of an Optical Surface Plasmonic Waveguide with a Bowtie Air Core

Author: JiaZhiZuo
Tutor: XueWenRui
School: Shanxi University
Course: Communication and Information System
Keywords: Surface plasmon Surface Plasmon optical waveguide FDFD Transmission characteristics
CLC: TN252
Type: Master's thesis
Year: 2011
Downloads: 34
Quote: 0
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Abstract

This is a message to the growing and requires processing capacity is growing faster times. RC delay, due to electronic technology exists an urgent need for new technology to deal with more and more information faster. Photonic technology has a higher data processing speed. However, due to the presence of the diffraction limit, this new technology at the crossroads of development. In recent years, to break through the diffraction limit of light new found - Surface Plasmon has brought new hope to the people of, and attracted the interest of physicists, chemists and biologically relevant materials scientist. With the development of nanotechnology, the use of nano-scale structures to manipulate surface plasmon is expected that the new technology will be integrated in the light, optical storage, microscopy and solar cells to realize its full potential, the same sensor design and application, especially biomolecular detection, and has broad prospects. This paper first described the concept of surface plasmons and surface plasmon reviewed, followed by peer-to-peer the ion optical waveguide development history and one of the key stage, and FDFD About. The main content of this article is: design a bow tie-shaped hollow surface plasmon optical waveguide. FDFD method, this fundamental mode waveguide support energy flux density distribution, the effective refractive index, propagation length and mode area were analyzed with the geometric structure parameters and wavelength dependence. The results show that the longitudinal direction of the energy flow is mainly distributed in the two upper and lower projections formed by the intermediate region. Can be adjusted by adjusting the geometric parameters and the working wavelength, the effective refractive index of the mode propagation length and pattern area. Under the conditions determined by the working wavelength, the effective refractive index with the projection radius increases decreasing trend, and the propagation length and mode area along with the projection radius increases tended to increase, the four corners of the arc radius The fine-tuning of the transmission characteristics of the waveguide obvious regulation around the radius of the fan-shaped area of ??the transmission characteristics of the waveguide. Under the conditions determined by the geometrical parameters, with respect to the case of the working wavelength λ = 705.0nm, working wavelength is large, the distribution range of the field is large, the contact area of ??the field with the metal surface is large, field and metallic silver mutually role is weak, the effective refractive index of smaller propagation distance is also longer. Finally, we discuss the possibility of such a hollow surface plasmon optical waveguide applications in the field of refractive index sensor and a pressure sensor. These studies will surface plasma technology provides a new theoretical foundation for the integration in the field of photonic devices and sensor applications.

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