近十年來，全球在奈米材料之研究與應用大幅成長，展望21世紀，諸多的科學和技術的發展將根植於奈米技術及材料，也就是將材料應用設計推至原子級 (Atomic Level)和奈米級(Nano Level)，預期奈米新材料和量子理論，可望突破目前大部分科技的極限。奈米材料和技術在聲、光、電、磁、熱等領域中，均具有重大的潛在應用前景及產生眾多的未來明星產業。於本論文，我們以金作為材料，研究三種奈米柱樣品(R40、R100、R120)在不同波長的雷射下的表面增強式拉曼，藉此了解樣品的光學性質。
首先，我們模擬結構在不同介質中的反射率，發現在R40、R100兩樣品的綠光波段反射率較好，而R120在可見光波段反射率表現不佳。接著，我們使用R6G溶液做為表面增強式拉曼的待測物，將結構浸泡於溶液。我們測量R6G的拉曼訊號，分析所有峰值的組成並進行擬合。在相同波長的光源下，我們發現結構R100有最好的表面增強式拉曼效果，結構R120的效果最差。進而比較不同波長的效果，將紅光與綠光功率皆固定在6 mW，在所有條件設定一致下，比較兩組光譜的峰值強度，得知綠光效果較好。我們又使用藍光進行量測，發現藍光下的拉曼光譜較不理想，受到結構本身影響。

Over the past decade, the researches and applications of nanomaterials has grown up significantly around the world. The scientific and technological developments were rooted in nanotechnology and materials, which is designed to push material were applied to the atomic level and nanoscale. Nano materials and technologies in the fields of sound, light and other applications fields, have significant potential application prospects and produce a large number of future star industries. In this thesis, we use gold as material to study the Surface-Enhanced Raman Scattering (SERS) of three kinds of nano-column samples (R40, R100, R120) under different wavelengths, so as the optical properties of samples.
First, we simulated the reflectivity of samples in different media. It was found that the reflectance of R40 and R100 these two samples was best in the green band, while the reflectance of R120 in the visible band was not good. We used the Rhodamine 6G (R6G) solution as a surface enhanced Raman medium. We took these structures to soak in the solution. We measured the Raman signals of R6G. Then we analyzed the composition of all the peaks and fitting them. At the same wavelength, the sample R100 had the best Raman enhancement effect, and R120 had the worst effect. The effects of different wavelengths were compared. The red and green power were fixed at 6 mW. We analyzed the Raman spectrum of red laser and green laser. We also found the blue laser is not the ideal wavelength, because the Raman spectrum affected by the structure itself.

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