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飞秒光丝阵列对10 GHz电磁波的吸收特性

孙中浩 董超 张亚春 何湘 倪晓武 骆晓森

孙中浩, 董超, 张亚春, 等. 飞秒光丝阵列对10 GHz电磁波的吸收特性[J]. 强激光与粒子束, 2018, 30: 053201. doi: 10.11884/HPLPB201830.170301
引用本文: 孙中浩, 董超, 张亚春, 等. 飞秒光丝阵列对10 GHz电磁波的吸收特性[J]. 强激光与粒子束, 2018, 30: 053201. doi: 10.11884/HPLPB201830.170301
Sun Zhonghao, Dong Chao, Zhang Yachun, et al. Absorption of 10 GHz electromagnetic waves by femtosecond filaments array[J]. High Power Laser and Particle Beams, 2018, 30: 053201. doi: 10.11884/HPLPB201830.170301
Citation: Sun Zhonghao, Dong Chao, Zhang Yachun, et al. Absorption of 10 GHz electromagnetic waves by femtosecond filaments array[J]. High Power Laser and Particle Beams, 2018, 30: 053201. doi: 10.11884/HPLPB201830.170301

飞秒光丝阵列对10 GHz电磁波的吸收特性

doi: 10.11884/HPLPB201830.170301
基金项目: 

国家自然科学基金项目 51107033

详细信息
    作者简介:

    孙中浩(1992—),男,硕士研究生,现主要从事激光等离子体与电磁波相互作用的研究; 18251950632@163.com

    通讯作者:

    骆晓森(1959—),男,博士,教授,从事激光物理方面的研究; nlglxs@163.com

  • 中图分类号: TN011;O437

Absorption of 10 GHz electromagnetic waves by femtosecond filaments array

  • 摘要: 为了研究飞秒光丝阵列对10 GHz电磁波的吸收特性,建立了飞秒光丝阵列吸收电磁波的有限元模型,研究了光丝内电子温度、电子数密度、光丝直径和电磁波的极化等参数对吸收系数的影响。研究结果表明:当电磁波偏振方向与光丝轴向垂直时,阵列对电磁波是透明的;增加光丝内电子数密度或提高电子温度,吸收系数先增大后减小;当光丝直径与电磁波趋肤深度相等时,吸收系数达到最大值。对于S极化电磁波,当光丝直径为50 μm时,吸收系数随入射角的增大而变大;当光丝直径为100~200 μm时,在入射角较小时,吸收系数随入射角的增大而变大;在入射角较大时会出现吸收峰值,最高可达0.45,且光丝直径越大,吸收峰值对应的入射角就越小;对于P极化电磁波,吸收系数随入射角增大而降低。
  • 图  1  飞秒光丝阵列与电磁波相互作用的几何示意图

    Figure  1.  Geometry used to describe the interaction of the incident microwave with the array made of cylindrical plasma filaments

    图  2  数值计算中电磁波的极化情况

    Figure  2.  Polarization of incident electromagnetic wave in numerical calculation

    图  3  电子数密度和电子温度对10 GHz电磁波的反射、透射和吸收系数的影响

    Figure  3.  Influence of the temperature and density of electrons on the transmission, reflection and absorption of electromagnetic wave

    图  4  光丝附近的能流密度

    Figure  4.  Power flow density of filament

    图  5  铜丝附近的能流密度

    Figure  5.  Power flow density of copper wire

    图  6  光丝直径及入射角对电磁波吸收的影响

    Figure  6.  Influence of the diameter of the filament and the incidence angle on the absorption of electromagnetic waves

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出版历程
  • 收稿日期:  2017-07-29
  • 修回日期:  2017-12-01
  • 刊出日期:  2018-05-15

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