金屬薄膜光子晶體光纖表面電漿子之模態與分析

Modeling and Analysis of Surface-Plasmon in Metal Film Photonic Crystal Fiber

楊熙正(Hsi-Cheng Yang)

指導教授 ： 蔣榮生

義守大學/電機資訊學院/電機工程學系/碩士(2014年)

https://doi.org/10.6343/ISU.2014.00293

摘要

本篇論文的主要目的是提出不同金屬薄膜的結構應用在光子晶體光纖上，以簡單的方法，降低製造成本，且可以金屬塗層鍍的非常均勻，提高傳輸品質，針對金屬薄膜光子晶體光纖之表面電漿子的模態分析及計算靈敏度進行探討。利用有限元素法模擬出不同的固態柱排列方式與材料變化、金屬材料、金屬薄膜厚度變化、金屬光纖光柵結構、金屬光柵週期性變化與雙層金屬光柵的第二層金屬材料更換，模擬出提高表面電漿子模態與耦合模態的等效折射率與靈敏度的最佳結構。由模擬結果顯示金屬材料以金有著最高的靈敏度為21.21(μm/RIU)，而金屬厚度變化，金屬薄膜厚度為80nm 有著高靈敏度的特性，利用此特性提出金屬薄膜光柵結構，在三十個週期表面電漿子模態有著最佳的等效折射率，且靈敏度為37.83(μm/RIU)，最後混合金屬材料Ag-Au 的靈敏度為40.71 (μm/RIU)與單一材料Ag 相比，具有個高傳輸、高靈敏度與低損耗的優異結果。

關鍵字

光子晶體光纖 ； 有限元素法 ； 表面電漿子

並列摘要

In this thesis, the purpose is proposed how to different metal film of Surface Plasmon mode work on D-shaped Photonic Crystal Fibers surface and increase the sensitivity, it is good for reduce costs, and using the Finite Element Method to analyze the effective index and obtain field intensity distribution to find Coupled mode.
For the Coupled mode, we discuss turn the angle of solid rods structure, different metal materials and Metal Film thickness to increase, and proposed to Metal Film Photonic Crystal Fiber grating with the second Metal Film of change metal materials. As shown in the result, the gold sensitivity is 21.21(μm/RIU) greater than other metals of the wavelength is 650nm to 850nm, and the sensitivity is 37.83(μm/RIU) of Metal Film thickness is 80nm what properties to have higher sensitivity. So we used the properties to proposed the Metal Film Photonic Crystal Fiber grating and the second Metal Film of change metal materials, it is higher sensitivity of 40.71(μm/RIU) compared with previous research.

並列關鍵字

Photonic Crystal Fiber ； Finite Element Method ； Surface Plasmon

參考文獻

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