The Characteristics of Higher Order Modes Analysis on Non-Centrosymmetric Geometric Shape and Bowtie-Like with Both Ag/Si or Metal/Insulator/Metal Tri-layer Structures

• Main Authors: Chih-Wei Yu, 余致緯
• Other Authors: Si-Chen Lee
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/79577595741477016699

碩士 === 國立臺灣大學 === 電子工程學研究所 === 100 === The thesis discussed the higher order modes enhancement on non-centrosymmetric, double apertures and bowtie-like hole array by experimental and simulation results. Considering the extraordinary transmission on these two types hole array, higher order modes were measured and calculated directly. In non-centrosymmetric hole array, trumpet shape hole array was investigated in the relation between main peaks and length of X. By varying the periodic parameter Px, the interaction between Wood’s anomaly and LSRs were shown clearly. Also, double LSRs are shown in MIM structure in shorter and longer wavelength. Double apertures sample perforated with Ag film were investigated. Besides the strong enhancement in bowtie structure [86], the experiment provide a novel way to stimulate higher order modes enhancement in different geometric figures such as double circles and double pentagons. Within double apertures structure such as circles and square, experiment results show the strong enhancement on (3,0) and (4,0) Ag/Si mode. Bowtie-like samples also provide higher order mode transmission. By replacing one of the bowtie triangles with circle, square, and rotation triangle, experiments show that the second order mode still being stimulated highly than fundamental mode. Also, double bowtie samples in orthogonal direction were investigated. Experiment results show that (2,2) Ag/Si mode stimulated more than fundamental mode and the (2,0) Ag/Si mode.