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.