彎曲波導耦合表面電漿子研究;Surface Plasmon Generation on Curved Waveguides

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/75178

Title:	彎曲波導耦合表面電漿子研究;Surface Plasmon Generation on Curved Waveguides
Authors:	張雅茹;Chang, Ya-Ju
Contributors:	光電科學與工程學系
Keywords:	彎曲波導;表面電漿;感測器;curved waveguide;Surface Plasmon;sensor
Date:	2017-07-11
Issue Date:	2017-10-27 17:17:35 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文中，我們提出利用彎曲波導耦合表面電漿於金屬微米半環上，透過改變微米金屬環與彎曲波導的相對位置，獲得能夠在金屬微米環上增強表面電漿共振的結構，並使用使用限時域差分法 (Finite-Difference Time- Domain Method, FDTD)來模擬實際電磁波於波導內傳播及耦合到金屬環上產生表面電漿共振模態的行為。本論文藉由改變波導使用的材料，將傳統稜鏡耦合使用的折射率為1.5 的玻璃提升到具有較高折射率為1.7 的波導，而此結構可利用鍺(Ge)氧化物來實現，這樣的改進使光場能更好的局限於波導內，使更多能量能夠耦合到金屬環上並增強表面電漿耦合，使該結構具對環境變化具有較高靈敏度，使用光偵測器結合本元件可將靈敏度提高至10-10RIU。;In this thesis, we launched a light in TM mode into a curved waveguide to generate surface plasmon polariton on a metallic micro-ring made by gold in Otto configuration. By changing the location of metallic micro-ring to curved waveguide, we can enhance the strength of the surface plasmon resonance. The structure is analyzed by the Finite-Difference Time-Domain Method. The refractive index of the curved waveguide is changed from 1.5 to 1.7. The confinement ability of the waveguide is improved. The energy coupled on metallic micro-ring is used to excite the surface plasmon polariton. The device shows a better sensitivity 10-10RIU.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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