實心柱型週期式陣列表面電漿奈米天線光學性質研究

利用有限元素法數值模擬的方式對奈米金屬棒結構進行模擬，主題一使用不同形狀且具有相同間距的奈米銀柱對陣列，將純金屬棒之幾何結構對頻譜的變化進行討論。主題二使用主題一效果較好之形狀金屬棒以三對環狀作模擬，利用六個粒子奈米金屬天線之共間隙當具有圓偏振和橢圓偏振光入射時會產生寬帶光譜響應，由於偶極天線對圓偏振光的不靈敏，使得諧振結構被帶到周圍的間隙擴大整個系統的頻譜，並對天線長度作調整，做出頻寬較大之天線。接著利用等長度之環狀天線可做出單一波長窄頻寬之特性，我們以圓形作等分切割，做出等長之扇形天線，並對頻譜的變化進行分析。

關鍵字

有限元素法；表面電漿；表面電漿奈米天線

並列摘要

Using finite element numerical simulation method for simulation of metal nanorod structure. The first theme uses a silver nanorod array of different shape and with the same gap. To discuss spectrum changes in the geometric structure of the pure metal rod. Theme II is using a shape of metal nanorod of best effect of the first theme to do simulation with three pairs of annular type. Six-particle common-gap plasmonic nanoantennas are utilized to obtain a broadband spectral response when illuminated with circular and elliptical polarization. Due to the insensitivity of dipole antennas to circular polarization, the resonant structures are brought together around the common-gap to expand the spectrum of the whole system. Take antenna length for adjustment to make a greater bandwidth of the antenna. Then take advantage of the loop antenna of equal length can be made narrower bandwidth of a single wavelength characteristics and to analyze the spectral changes.