3-D FDTD Studies of Several Nano Metal Structures
碩士 === 國立臺灣大學 === 光電工程學研究所 === 105 === The finite-difference time-domain (FDTD) method has been widely used in computational electromagnetics. In this thesis, we develop a parallelized three-dimensional (3-D) FDTD simulator in C++ language and use the message passing interface (MPI) protocol in orde...
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| Format: | Others |
| Language: | en_US |
| Published: |
2017
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| Online Access: | http://ndltd.ncl.edu.tw/handle/as8sa3 |
| Summary: | 碩士 === 國立臺灣大學 === 光電工程學研究所 === 105 === The finite-difference time-domain (FDTD) method has been widely used in computational electromagnetics.
In this thesis, we develop a parallelized three-dimensional (3-D) FDTD simulator in C++ language and use the message passing interface (MPI) protocol in order to reduce the simulation time.
The main topic of this research is to analyze the gap-field enhancement of several nano metal structures under incident optical waves. We first simulate the single Multi-Bent-Section Nano-Antennas (MBSNAs) by applying a broadband normally incident plane wave to get their responses for the electric-field enhancement and resonant wavelengths in the antenna gap from the wavelength range of 0.3 um to 4.0 um. Then the antenna arm length of the MBSNAs are proportionally elongated and the influence of the varied antenna arm length is studied. We find that the antenna arm length has positive linear relationship with the resonant wavelength. In the second part, the MBSNA(1)''s and U-shaped nano-antennas with different proportions of the bent section with the same total antenna length are investigated. Then we study modified nano-antennas and compare with the MBSNA(1). With the results from comparing the gap-field enhancement values, we find that the MBSNA(1) with the larger proportion of x-direction component has the higher value of gap enhancement. So after that, the influence of the antenna length of the linear dipole antenna is studied.
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