本篇論文是利用有限時域差分法(FDTD)開發的軟體MEEP 來模擬銀
奈米長方柱體。以水平或垂疊排列在玻璃基版上的表面電漿子之研究，研
究其吸收光譜分析、能量場圖、以及電荷分布。
基本的棒狀分成兩種，第一種是長方體，第二種則是將長方體以長度
較長的方向分成三等份，並取左右兩側兩等份空下中間做為第二種棒狀。
根據棒狀的排列不同有不同的結果，而排列的方法分成兩種，第一種是把
棒狀水平排列，另一種是重疊排列。根據研究結果兩者在吸收光譜在可見
光有顯著的訊號。觀測的重點在空氣對金屬的介面。能量場圖中有在特定
頻率中對應不同結構的部分。而電荷分布有助我們分析模態。最後我們選
擇其中一個結構中包含在第二種結構，並在空隙中放入水、甘油…等物質，
這會使特徵頻譜產生位移，電場能量分布與電荷分布也會改變，這可以成
為優良生物檢測器。

In this thesis, the Finite-Difference Time-Domain program MEEP is used in
our simulation. We simulated characteristic of silver rectangular nanocuboid
about absorption spectrum, electric-field energy density and charge density.
The structure have two shapes, the first is a rectangular, second is remove
one of third in middle of rectangular, both be set on glass substrate. And we
have two methods to combine the two shapes, horizon with overlap.
We observed interface air-silver. The specific frequency could be correspond
specific structure in electric-field energy density, and we could used charge
density to analyze specific modes.
According to our research, we selected one of combination, and putted water,
glycerin in been removed one of third in middle of rectangular in spacing. The
spectrum had shift, and we can used this characteristic become good biological
detection.

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