Generation of terahertz hollow beams by a photonic quasi-crystal flat lens

Generation of terahertz hollow beams by a photonic quasi-crystal flat lens
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通过光子准晶平面透镜产生太赫兹空心光束

DOI:
10.7567/apex.9.062003
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发表时间:
2016-05
影响因子:
2.3
通讯作者:
J. J. Liu
J. J. Liu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
B. Feng;E X. Liu;Z. M. Wang;W. C. Cai;H. F. Liu;S. Wang;T. Y. Liang;W. Xiao;J. J. Liu

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设计了一种十次方光子准晶体(PQC)平面透镜,它可以将入射的太赫兹(THz)平面波转换成空心光束。通过改变透镜中心的点缺陷的参数,即,该PQC平面透镜可用作太赫兹光学囚禁或光镊的柔性工具。结果表明,在远场可以产生平均束宽与入射波长相近、桶内功率大于96%的艾里盘。
We have designed a decagonal photonic quasi-crystal (PQC) flat lens, which turns an incident terahertz (THz) plane wave into a hollow beam easily and flexibly. The features of the THz hollow beam can be controlled by varying the parameters of a point defect in the center of the lens, i.e., the PQC flat lens can be used as a flexible tool for THz optical captivity or optical tweezer. The results showing that an airy disk, whose mean beam width is similar to the incident wavelength and power-in-the-bucket (PIB) is more than 96%, can be generated in the far field.
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