Electromagnetics Study of Bull''s-Eye Structures for Optical-Wave Transmission
Date Issued
2013
Date
2013
Author(s)
Su, Ying-Jie
Abstract
The aim of this dissertation research is to study how to utilize the bull''s-eye structure to produce multiple peaks for the extraordinary optical transmission (EOT) phenomenon and multiple beams for the beaming phenomenon. For the purpose of realizing multiple-peak and multiple-beam phenomena, we have used the mixedperiod grooves to surround a single subwavelength slit to form the mixed-periodbull''s-
eye (MPBE) and investigated the interaction between the incident light and the MPBE. Here the mixed-period grooves refer to a set of grooves arranged with particular groove pitches, which are formed by merging two sets of periodic grooves with similar geometries but mainly different groove periodicities. Also, we have developed a finite-difference time-domain (FDTD) method based simulator with parallel computing for modelling the electromagnetic phenomena generated by the MPBE. Based on the FDTD simulation, we have successfully demonstrated that the multiple-peak EOT phenomenon and the multiple-beam beaming phenomenon can
be produced by the MPBE. In addition, the numerical results given by the FDTD method are consistent with the theoretical results given by the surface plasmon polariton (SPP) diffraction theory.
Moreover, we have applied the idea for the mixed-period grooves to the twodimensional (2-D) bull''s-eye, namely, a single subwavelength hole surrounded by concentric annular grooves, to form a 2-D MPBE. Our FDTD simulation results show that the 2-D MPBE also exhibits multiple EOT peaks. Based on the numerical results given is this work, we believe that the presented MPBE will have potential applications in compact photinic devices such as multiple-peak optical filters and miniatured optical beam-splitters.
Subjects
牛眼型結構
次波長結構
表面電漿子
指向性出射現象
有限差分時 域法
異常光學穿透現象
Type
thesis
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