FDTD simulation of nano imaging with silver nano rod structure

碩士 === 國立臺灣大學 === 物理研究所 === 94 === Silver nanorods have an excellent localization of the transmitted wave; especially the localized spot has a space below the bottom of the nanorods. In this dissertation, the near field distribution of silver nanorods is investigated. The numerical method knows as f...

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Main Authors: Tieh-Ming Chang, 張鐵明
Other Authors: 蔡定平
Format: Others
Language:zh-TW
Published: 2006
Online Access:http://ndltd.ncl.edu.tw/handle/68127858152127808964
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spelling ndltd-TW-094NTU051980232015-12-16T04:38:20Z http://ndltd.ncl.edu.tw/handle/68127858152127808964 FDTD simulation of nano imaging with silver nano rod structure 利用時域有限差分法對奈米銀柱結構的奈米成像性質之研究 Tieh-Ming Chang 張鐵明 碩士 國立臺灣大學 物理研究所 94 Silver nanorods have an excellent localization of the transmitted wave; especially the localized spot has a space below the bottom of the nanorods. In this dissertation, the near field distribution of silver nanorods is investigated. The numerical method knows as finite difference time domain (FDTD) is introduced into near field optics. The effects of various radius, lengths, gaps and separations of silver nanorod array are investigated. Results of the calculation provide a direct theoretical basis for the relation between the localization of surface Plasmon and the enhance of near field. The near field distribution of nano hexagonal rod, and the parallel nanorod array are studies systematically using our FDTD method. It is found that the image is highly dependent on the spacing and radius of nanorods. Results of single nanorod show similar near field distribution to an electrical dipole. Due to the boundary condition at the interface, the polarized incident wave enhance the field at boundary of the nanorod. The influence of nanorods on contrast is studied with FDTD method as well. Silver nanorods have an excellent effect on localizing the transmitted wave, especially, the enhancements below the bottom of the nanorods. In this dissertation, a systematic apparoach to studying the near-field distributions, from a single nanorod to an array of nanorods, is carried out. The three-dimensional finite difference time domain (3D FDTD) which is a well known and powerful numerical method is used to simulate the interactions of the optical waves with the silver nanorods. The near-field distribution of a single nanorod is similar to an electrical dipole. The effects of radius variation, lengths of nanorods, gaps and spacings in the silver nanorod array are investigated. It is found that the image formed from the transmitted wave is highly dependent on the spacing and radius of nanorods. According to the relation between the localization of surface plasmon and the enhancement of near field, the optimal criteria can be obtained in constructing optical nanolithographic sturcutures. 蔡定平 2006 學位論文 ; thesis 59 zh-TW
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language zh-TW
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description 碩士 === 國立臺灣大學 === 物理研究所 === 94 === Silver nanorods have an excellent localization of the transmitted wave; especially the localized spot has a space below the bottom of the nanorods. In this dissertation, the near field distribution of silver nanorods is investigated. The numerical method knows as finite difference time domain (FDTD) is introduced into near field optics. The effects of various radius, lengths, gaps and separations of silver nanorod array are investigated. Results of the calculation provide a direct theoretical basis for the relation between the localization of surface Plasmon and the enhance of near field. The near field distribution of nano hexagonal rod, and the parallel nanorod array are studies systematically using our FDTD method. It is found that the image is highly dependent on the spacing and radius of nanorods. Results of single nanorod show similar near field distribution to an electrical dipole. Due to the boundary condition at the interface, the polarized incident wave enhance the field at boundary of the nanorod. The influence of nanorods on contrast is studied with FDTD method as well. Silver nanorods have an excellent effect on localizing the transmitted wave, especially, the enhancements below the bottom of the nanorods. In this dissertation, a systematic apparoach to studying the near-field distributions, from a single nanorod to an array of nanorods, is carried out. The three-dimensional finite difference time domain (3D FDTD) which is a well known and powerful numerical method is used to simulate the interactions of the optical waves with the silver nanorods. The near-field distribution of a single nanorod is similar to an electrical dipole. The effects of radius variation, lengths of nanorods, gaps and spacings in the silver nanorod array are investigated. It is found that the image formed from the transmitted wave is highly dependent on the spacing and radius of nanorods. According to the relation between the localization of surface plasmon and the enhancement of near field, the optimal criteria can be obtained in constructing optical nanolithographic sturcutures.
author2 蔡定平
author_facet 蔡定平
Tieh-Ming Chang
張鐵明
author Tieh-Ming Chang
張鐵明
spellingShingle Tieh-Ming Chang
張鐵明
FDTD simulation of nano imaging with silver nano rod structure
author_sort Tieh-Ming Chang
title FDTD simulation of nano imaging with silver nano rod structure
title_short FDTD simulation of nano imaging with silver nano rod structure
title_full FDTD simulation of nano imaging with silver nano rod structure
title_fullStr FDTD simulation of nano imaging with silver nano rod structure
title_full_unstemmed FDTD simulation of nano imaging with silver nano rod structure
title_sort fdtd simulation of nano imaging with silver nano rod structure
publishDate 2006
url http://ndltd.ncl.edu.tw/handle/68127858152127808964
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