| Analysis of restriction factors of widening diffraction bandwidth of multilayer dielectric grating |
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| 作者姓名： | 汪剑鹏 晋云霞 麻健勇 邵建达 范正修 |
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| 作者单位： | Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 10704079), and the Natural Science Foundation of Shanghai Committee of Science and Technology, China (Grant No. 10ZR1433500). |
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| 摘 要： | In order to design a multilayer dielectric grating with wide-bandwidth diffraction spectrum, the restriction factors of both the reflection bandwidth of multilayer dielectric high-reflectivity mirror and the guided-mode resonance phenomenon are studied in detail. The reflection characteristics of high-reflectivity mirror in zeroth and 1st transmitted diffraction orders are quantitatively evaluated. It is found that the reflection bandwidth of high-reflectivity mirror in 1st transmitted diffraction order, which determines the final diffraction bandwidth of multilayer dielectric grating, is evidently compressed. Furthermore, it is demonstrated that the reducing of grating period is an effective approach to the elimination of guided mode resonance over a required broad band range both spectrally and angularly. In addition, the expressions for calculating the maximum period ensuring no guided mode resonance in the required bandwidth are derived. Finally, two high-efficiency pulse-compression gratings with broad-band are presented.
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| 关 键 词： | multilayer dielectric grating broad band diffraction bandwidth reflection bandwidth guided-mode resonance |
| 收稿时间： | 2009-12-07 |
Analysis of restriction factors of widening diffraction bandwidth of multilayer dielectric grating |
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| Wang Jian-Peng,Jin Yun-Xi,Ma Jian-Yong,Shao Jian-Da and Fan Zheng-Xiu.Analysis of restriction factors of widening diffraction bandwidth of multilayer dielectric grating[J].Chinese Physics B,2010,19(10):104201-104201. |
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| Authors: | Wang Jian-Peng Jin Yun-Xi Ma Jian-Yong Shao Jian-Da and Fan Zheng-Xiu |
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| Institution: | Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai rm201800, China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai rm201800, China;Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai rm201800, China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai rm201800, China;Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai rm201800, China |
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| Abstract: | In order to design a multilayer dielectric grating with wide-bandwidth diffraction spectrum, the restriction factors of both the reflection bandwidth of multilayer dielectric high-reflectivity mirror and the guided-mode resonance phenomenon are studied in detail. The reflection characteristics of high-reflectivity mirror in zeroth and -1st transmitted diffraction orders are quantitatively evaluated. It is found that the reflection bandwidth of high-reflectivity mirror in -1st transmitted diffraction order, which determines the final diffraction bandwidth of multilayer dielectric grating, is evidently compressed. Furthermore, it is demonstrated that the reducing of grating period is an effective approach to the elimination of guided mode resonance over a required broad band range both spectrally and angularly. In addition, the expressions for calculating the maximum period ensuring no guided mode resonance in the required bandwidth are derived. Finally, two high-efficiency pulse-compression gratings with broad-band are presented. |
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| Keywords: | multilayer dielectric grating broad band diffraction bandwidth reflection bandwidth guided-mode resonance |
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