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| 題 名 | 光子晶體波導濾波器與分光器之模擬分析=Simulation and Analysis of Photonic Crystal Waveguide Filter and Splitter |
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| 作 者 | 林俊鋒; 王哲偉; | 書刊名 | 遠東學報 |
| 卷 期 | 25:2 2008.06[民97.06] |
| 頁 次 | 頁215-223 |
| 分類號 | 448.552 |
| 關鍵詞 | 光子晶體; 濾波器; 分光器; 缺陷; Photonic crystal; Waveguide filters; Beam splitter; Defect; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本文是利用電腦輔助分析軟體COMSOL 及分別改變特殊晶格直徑與缺陷距離,以進行光子晶體波導在濾波器與分光器的模擬分析。在6.5μm x 6μm矽基材及中央通道寬度1μm,特殊晶格折射率為2.57,特殊晶格直徑0.07~0.09μm 及缺陷距離2 至4μm 的濾波器分析中,發現當特殊晶格直徑0.08±0.01μm缺陷距離4μm 時,在輸入波長1.39±0.01μm 會有明顯的濾波效應;但當固定特殊晶格直徑0.08μm改變缺陷距離由2 至4μm,當缺陷距離3μm時,則在1.29μm附近會有較明顯的濾波效應,缺陷距離2 或4μm時是在輸入波長1.39μm 有明顯的濾波效應,經比較可知缺陷距離3μm 產生了不同之共振效應,所以造成在不同的波長產生濾波效應。在7μm x 7μm矽基材的分光器的分析中,上下通道特殊晶格折射率分別為3 與2,發現當特殊晶格直徑0.08±0.01μm時,在1.30μm附近隨著特殊晶格直徑的增加,上下通道輸出能量比是下降的,而在1.49μm附近上下通道輸出能量比卻是上升,有兩個明顯之分光波長;但當固定特殊晶格直徑0.08μm,改變缺陷距離由2 至4μm,發現當缺陷距離3μm時,比較明顯之上下通道輸出能量比的高峰,卻是發生在波長1.16μm上,且比值高達81.12,遠遠超過其它缺陷距離對應之分光比。由以上之分析,可知改變缺陷距離會產生不同之共振腔效應,所以造成濾波與分光效應發生在不同的波長上,比改變特殊晶格直徑所造成的影響來的大。 |
| 英文摘要 | The objective of this study is to use the software Comsol and change the diameter of particular lattice and defect length to proceed the simulation of photonic crystal waveguide filter and splitter. In the simulation of filter within the substrate of silicon 6.5μm x 6μm with a central channel (line defect) of width 1μm, we change the diameter of particular lattice with refractive index of 2.57 from 0.07μm to 0.09μm and the distance between the two particular lattices (defect length) from 2μmto 4μm. We can find that when the diameter of particular lattice is 0.08±0.01μm and the distance between the two particular lattices is 4μm, the filter wavelength is 1.39±0.01μm. The change of diameter only induces small variation of filter wavelength. But when the diameter of particular lattice is 0.08μm and the distance between the two particular lattices is 3μm, the obvious filter effect arise and in a different wavelength of 1.29μm. On the other hand, in the simulation of photonic crystal waveguide for beam splitter within the substrate of silicon 7μm x 7μmand two particular lattices with refractive index of 2 and 3 respectively. The diameter of particular lattice is from 0.07μmto 0.09μm and the distance between the two particular lattices from 2μmto 4μm. After simulation, we can find that when the diameter of particular lattice is 0.08±0.01μm and the distance between the two particular lattices is 4μm for the wavelength of incident light 1.30 and 1.49μm, the obvious beam splitter effect happens in the up and low channels. The power splitter ratio falls in 1.30μm and rises in 1.49μm with the increase of diameter of lattices. But when the diameter of particular lattice is 0.08μm and the distance between the two particular lattices is 3μm for the wavelength of incident light 1.16μm, the obvious power beam splitter ratio is up to a higher value of 81.12. This distance produces different cavity-resonance in a different wavelength. Therefore, from the above analysis and simulation, we can know that the filter wavelength and beam splitter ratio are deeply influenced by the distance between the particular lattices more than the change of lattice diameters. |
本系統中英文摘要資訊取自各篇刊載內容。