| 相位阶跃变化型太赫兹波带片 |
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| 引用本文： | 鞠智鹏,李德华,周薇,马建军,李乾坤,屈操.相位阶跃变化型太赫兹波带片[J].红外与激光工程,2013,42(6):1519-1522. |
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| 作者姓名： | 鞠智鹏 李德华 周薇 马建军 李乾坤 屈操 |
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| 作者单位： | 1.山东科技大学 太赫兹研究中心,山东青岛266590; |
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| 基金项目： | 国家自然科学基金(61071016/F010608)；青岛市科技计划项目(10-3-4-2-5-jch)；山东科技大学研究生科技创新基金 |
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| 摘 要： | 对相位阶跃变化型太赫兹波带片衍射效率进行了理论研究。根据标量衍射理论，相位阶跃变化型波带片可以完成对高斯光束太赫兹波的聚焦。相位阶跃变化型波带片的衍射规律与薄透镜聚焦的规律相似。对其在光轴以及焦平面上太赫兹强度分布及衍射效率进行了模拟，通过与相位连续变化型，台阶型波带片的衍射效率进行对比分析，结果表明相位阶跃变化型波带片具有更好的衍射效率和性能。计算了一种相位阶跃变化型太赫兹波带片的加工尺寸，适合微机械加工法，有很好的应用价值。
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| 关 键 词： | 相位阶跃 衍射光学 太赫兹 波带片 |
| 收稿时间： | 2012-10-10 |
Phase-stepped-changing Terahertz zone plate |
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| Ju Zhipeng
,
Li Dehua
,
Zhou Wei
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Ma Jianjun
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Li Qiankun
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Qu Cao.Phase-stepped-changing Terahertz zone plate[J].Infrared and Laser Engineering,2013,42(6):1519-1522. |
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| Authors: | Ju Zhipeng Li Dehua Zhou Wei Ma Jianjun Li Qiankun Qu Cao |
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| Affiliation: | 1.Terahertz Science and Technology Research Center,Shandong University of Science and Technology,Qingdao 266590,China;2.Qingdao Key Laboratory of Terahertz Technology,Qingdao 266590,China |
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| Abstract: | Diffraction efficiency investigation of zone plate with stepped phase for terahertz frequencies was presented in this paper. According to Rayleigh-Sommerfeld diffraction theory, the zone plate with phase stepped changing can focus Gaussian beam with high diffraction efficiency. Diffraction law of the phase-stepped-changing zone plate was similar to thin lens. Simulations of intensity distribution and diffraction efficiency in phase-stepped-changing, phase-continuous-changing and phase-correcting Fresnel zone plate were conducted and compared. Results show that the focusing performance and the diffraction efficiency of phase-stepped-changing zone plate is better. A phase-stepped-changing zone plate is calculated. It can be produced by micro-mechanical method. |
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| Keywords: | phase-stepped-changing diffraction optics terahertz zone plate |
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