Effects of incident light polarization on optical transmittance through subwavelength metal holes arrays

Effects of incident light polarization on optical transmittance through subwavelength metal holes arrays
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入射光偏振对亚波长金属孔阵列光透射率的影响

DOI:
10.1016/j.ijleo.2012.06.037
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发表时间:
2013-08
期刊:
Optik - Int. J. Light Electron Opt
影响因子:
--
通讯作者:
王新林
王新林
中科院分区:
其他
文献类型:
--
作者:
王新林

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采用 3D 时域有限差分法 (FDTD) 来模拟入射到亚波长孔阵列穿孔的银膜上的飞秒光脉冲。银膜中纳米孔的方形阵列和六边形阵列均被考虑。研究发现,方形阵列的光学透过率几乎不随入射光偏振方向的变化而变化,而六边形阵列的光学透过率变化明显,特别是当波长等于孔阵列的周期时。这对于新型光学器件的应用非常重要。
3D finite-difference time-domain method (FDTD) is carried out to simulate femtosecond optical pulses incident on silver film perforated by subwavelength holes arrays. Both square arrays and hexagonal arrays of nanoholes in silver film are considered. It is found that optical transmittance of square arrays almost does not vary with the polarization direction of incident light, while optical transmittance of hexagonal arrays varies obviously, especially when the wavelength equals the periodicity of holes arrays. This will be important for applications of novel optical devices.
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