Localized Surface Plasmon Polarition (LSPP) Based Sensor Made of a Round-Shaped Metal Array for Applications in Biosensing

圓形金屬陣列之局域性表面電漿子感測器應用於生物檢測

鄭程文(Cheng-Wen Cheng) ； 亞伯斯(Mohammed Nadhim Abbas) ； 邱昭瑋(Chao-Wei Chiu) ； 賴坤廷(Kun-Ting Lai) ； 施閔雄(Min-Hsiung Shih) ； 張亞中(Yia-Chung Chang)

《光學工程》 118期 (2012/06) Pp. 20-26

https://doi.org/10.30011/OE.201206.0004

摘要

本文將實驗探討二維金屬圓形碟型結構製作在二氧化矽/金/矽基板上。利用傅氏轉換紅外線光譜儀，我們觀察到一個與角度偏振無關的局域性表面電漿子模態，此模態來自於類似法布里－珀羅共振模式。此結構可量測折射率變化從1到1.39，並具有高入射角度容忍度與局域性感測特性。它有潛力應用於生物醫學診斷、食品安全性監控和環境偵查。

關鍵字

電漿子光學 ； 金屬 ； 局域表面電漿子 ； 局域表面電漿共振感測器

並列摘要

Two-dimensional metallic round-shaped disk structure on a SiO2/Au/Si substrate was experimentally studied. By using a Fourier transform infrared spectrometer, an angle and polarization independent localized surface plasmon polariton mode caused by a Fabry-Perot-like resonance was observed. Such structure has the ability to sense changes in refractive index from 1 to 1.39. Because of its large incident angle tolerance and local sensing ability, the structure can potentially be utilized for applications in biomedical diagnostics, food safety monitoring, and environmental detection.

並列關鍵字

Plasmonics ； metals ； localized surface plasmon polaritons (LSPPs) ； localized surface Plasmon resonance (LSPR) sensors