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題名 | Perturbation Analysis of Holographic Gratings=全像式光柵之擾動分析 |
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作者 | 魏清泉; Wei, Ching-chuan; |
期刊 | 建國學報 |
出版日期 | 20010600 |
卷期 | 20 2001.06[民90.06] |
頁次 | 頁389-395 |
分類號 | 448.5 |
語文 | eng |
關鍵詞 | 光柵; 擾動; 傳輸線; 全像式; 格林函數; Grating; Perturbation; Transmission line; Holographic; Green function; |
中文摘要 | 全像式光柵對於平面波之散射,光柵層可被視為加諸於均勻介質的一種擾動。使用一階擾動分析,此種介質之擾動乃導致散射波之來源,經由教學推導,此場之邊界質問題可被轉換成含分佈式電流源之等效傅輸線方程式,因此格林函數技巧可被用來計算光柵層中之場。這種數值計算方法所得的結果與完全解的值相當接近。 |
英文摘要 | Plane-wave scattering by a holographic grating is presented. The gracing layer can be considered as a perturbation imposed on the uniform medium. Based on the perturbation analysis, this perturbation becomes the source of a diffraction wave and the boundary-value problem can be translated into the equivalent transmission-line equations with distributed current source; therefore, the Green Function technique is utilized here to calculate the fields in the grating layer. The numerical examples are carefully compared and found to agree quite well with exact results obtained by rigorous treatment. |
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