具有強場增益表面電漿及提高抗反射率之小尖針倒金字塔奈微米結構

Abstract

本研究探討應用在分子檢測領域之小尖針倒金字塔奈米電漿子結構及太陽能電池研究領域之微米抗反射結構。利用理論模擬、結構製作及光學量測方法來研究小尖針倒金字塔奈米電漿子結構及微米抗反射結構之物理行為。在分子檢測領域方面，小尖針倒金字塔奈米電漿子結構能夠獲得較佳的表面電漿效應及局部場增益。並且，在比較沒有小尖針的倒金字塔奈米電漿子結構時發現，具有小尖針倒金字塔奈米電漿子結構的增強表面電漿效應及局部場增益，皆存在於在倒金字塔內的小尖針結構周圍。本研究也進一步討論藉由改變小尖針結構的高度及角度時，亦獲得多樣貌的遠場輻射圖騰。在太陽能電池研究領域方面，小尖針倒金字塔微米抗反射結構能夠獲得較佳的抗反射效率。比較沒有小尖針的倒金字塔微米抗反射結構發現，入射光能夠藉由倒金字塔內的小尖針影響下，使入射光在結構內產生多次的反射，而且抗反射效率能夠提高3%到4%左右。最後，對於應用在分子檢測領域研究的結果得知，本研究所提出的結構可以被用來設計遠場輻射特徵的場增益表面增強拉曼散射結構。同時，對於應用在太陽能電池研究領域的結果發現，具有小尖針倒金字塔微米結構未來能應用在特殊場合之織狀化太陽能電池結構。

Applying plasmonic inverted pyramidal nanostructures with the tips to molecular detection and applying inverted pyramidal microstructures with the tips to solar cells are studied. The simulation, fabrication, and measurement can be useful for describing physical explanations. For the plasmonic inverted pyramidal nanostructures with the tips, our proposed nanostructures with the tips can have stronger field enhancements. Compared with inverted pyramidal nanostructures without the tips, we found that the field enhancements are around the pits and far field radiation pattern can be varied by changing the tip height and tip tilt angle. For the anti-reflection inverted pyramidal microstructures with the tips, our proposed microstructures with the tips can increase the anti-reflection efficiency. Compared with inverted pyramidal microstructures without the tips, we found that the light of our proposed structure has more multiple reflection between different surfaces of the inverted pyramidal microstructures with the tips and the results show that reflectivity is 3% to 4% lower. Our study can be useful for the designing strong field enhancement plasmonic nanostructure with specific far field radiation properties and designing textured structures for solar cells in specific applications.