| 亚波长光栅的模态特性与衍射效率及其应用 |
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| 引用本文： | 唐元开,王正岭,刘清雅.亚波长光栅的模态特性与衍射效率及其应用[J].电子科技,2016,29(3):118. |
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| 作者姓名： | 唐元开 王正岭 刘清雅 |
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| 作者单位： | (江苏大学 理学院,江苏 镇江 212013) |
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| 基金项目： | 江苏省自然科学基金资助项目(BK2011462);江苏省高校自然科学研究重大基金资助项目(15KJA140001);江苏省大学生创新训练重点基金资助项目(201510299001Z) |
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| 摘 要： | 采用模态理论研究了TE偏振与TM偏振入射光在一维亚波长光栅区域的模式特性,分析了不同传播模态的有效折射率及其差值与入射条件、光栅周期、光栅深度及光栅填充比之间的关系,使用干涉法得到了在考虑光栅凹槽深度的情况下两种模态的光栅衍射效率。应用亚波长光栅的模式特性与光栅衍射效率设计了一种偏振分束器,其特性是在利特罗入射的条件下,单色光波在0级衍射处为TM偏振,在-1级处为TE偏振。
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| 关 键 词： | 亚波长光栅 模态理论 有效折射率 衍射效率 偏振分束器 |
Mode Properties and Diffraction Efficiency of Subwavelength Grating and Their Applications |
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| TANG Yuankai,WANG Zhengling,LIU Qingya.Mode Properties and Diffraction Efficiency of Subwavelength Grating and Their Applications[J].Electronic Science and Technology,2016,29(3):118. |
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| Authors: | TANG Yuankai WANG Zhengling LIU Qingya |
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| Affiliation: | (School of Science,Jiangsu University,Zhenjiang 212013,China) |
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| Abstract: | Mode properties of the subwavelength grating is investigated by the modal method with the TE (or TM)-polarized incident wave in the grating region.The relations between the effective index of different propagation modes and other parameters (the condition of incident,periodicity,depth and fill factor of grating) are also studied.The diffraction efficiencies of two modes are obtained by the interference method.Then,a polarizing beam splitter is designed successfully for all TM-polarized light to propagate in the 0th transmitted order and for all TE-polarized light to propagate in the -1st order with the Littrow-mounting incidence. |
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| Keywords: | subwavelength grating modal method effective index diffraction efficiency polarizing beam splitter |
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