| 金属光栅的非对称透射现象研究 |
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| 引用本文： | 陈泳屹,秦莉,王立军,刘益春.金属光栅的非对称透射现象研究[J].发光学报,2013,34(8):1040-1045. |
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| 作者姓名： | 陈泳屹 秦莉 王立军 刘益春 |
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| 作者单位： | 1. 发光学及应用国家重点实验室 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033;
2. 中国科学院大学, 北京 100049;
3. 东北师范大学, 吉林 长春 130024 |
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| 基金项目： | 国家基金重点项目(61234004);国家自然科学基金面上项目(61176045);国家自然科学青年基金(61106068)资助项目 |
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| 摘 要： | 提出一种利用表面等离子体耦合的金属光栅结构,该光栅结构因入射光的方向和耦合表面等离子体的条件不同,从不同方向入射时会有不同的透射率。周期为500 nm、填充因子为0.7的Au-SiO2光栅结构在565~589 nm波段具有单向透射性。当填充因子为0.662时,最大透射对比率达3×104。当光栅厚度为60 nm时,入射波长在570~630 nm之间的透射对比率均可达到5以上,最高透射率为43%。当光栅周期为1 100 nm时,1 530~1 590 nm波段的透射对比率均大于5,可以满足中红外波段的应用。
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| 关 键 词： | 表面等离子体 光栅 填充因子 非对称透射 |
| 收稿时间： | 2013-03-26 |
Numerical Study on The Unsymmetrical Transmission Phenomenon in Metal Gratings |
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| CHEN Yong-yi,QIN Li,WANG Li-jun,LIU Yi-chun.Numerical Study on The Unsymmetrical Transmission Phenomenon in Metal Gratings[J].Chinese Journal of Luminescence,2013,34(8):1040-1045. |
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| Authors: | CHEN Yong-yi QIN Li WANG Li-jun LIU Yi-chun |
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| Institution: | 1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Northeast Normal University, Changchun 130024, China |
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| Abstract: | A kind of metal gratings based on surface plasmon coupling was presented in this paper. The metal grating has different transmission rate according to incident direction because of different surface plasmon coupling conditions. The unsymmetrical transmission phenomenon appears for the Au-SiO2 grating when the periodic is 500 nm and the filling factor is 0.7, particularly for wavelength from 565 to 589 nm. A maximum transmission contrast of more than 3×104 is found at filling factor 0.662. When the thickness of Au is 60 nm, the transmission contrast is more than 5 during 570~630 nm, and the maximum transmission is 43%. When the periodic is 1 100 nm, the transmission contrast is more than 5 during 1 530~1 590 nm, which satisfies for the mid-infrared applications. |
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| Keywords: | surface plasmon gratings filling factor unsymmetrical transmission |
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