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題名 | 表面電漿金奈米結構之光操控研究=Light Manipulation by Gold Nanobumps |
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作者 | 張家民; 朱正弘; 曾銘綸; 黃耀緯; 黃信維; 陳柏翰; 蔡定平; | 書刊名 | 光學工程 |
卷期 | 117 2012.03[民101.03] |
頁次 | 頁29-35 |
分類號 | 448.5 |
關鍵詞 | 表面電漿; 奈米結構; 表面光學; 散設光; 聚焦光點; Surface plasmons; Nanostructures; Optics at surfaces; Scattering light; Focusing; |
語文 | 中文(Chinese) |
中文摘要 | 本文研究表面電漿波與表面金奈米結構作用後之光學散射行為。利用飛秒雷射製作金奈米凸起結構,並由全反射式光學量測系統量測奈米凸起結構與表面電漿波之間的散射影像,並探討其遠場散射行為。排列奈米凸起成圓弧結構可將其散射光於空間中疊加重建成一聚焦光點,此光點之強度半高寬為287 nm,達光學繞射極限。此外發現聚焦光點於空間的高度位置與圓弧曲率半徑呈正相關。此研究結果可應用於未來奈米光子學之件發展。 |
英文摘要 | Backward and forward scattering of surface plasmonic wave interactions from goldnanobumps on the surface of a 30 nm gold thin film demonstrate three-dimensional (3-D)focusing and diverging properties. Fan-shaped forward scattering of individual nanobump isobserved. Quarter circle structure composed of nanobumps is exploited to manipulatescattering from each nanobump. Experimental results show 3-D propagation vectors generatedby the gold nanobumps with their heights of 16 nm can deflect the surface plasmonic waves toproduce 3-D focusing at 3.6 micron above the surface of gold film. We clearly demonstrate3-D forward and backward focusing from gold nanobumps are with different amplitudes anddirections of the vertical propagation vectors. |
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