金属亚波长狭缝阵列结构的太赫兹偏振透射特性研究

摘要

利用太赫兹时域光谱技术，研究了金属亚波长狭缝阵列结构的太赫兹透射特性。结果表明，太赫兹波会激发金属狭缝阵列结构的表面等离体波共振，表面等离子体共振产生太赫兹波段超强透射现象。由于表面等离子体共振效应，这种狭缝结构对于透射的太赫兹产生很高偏振度，这些实验结果为制作太赫兹波段偏振器件提供了有益的参考。%According to terahertz time domain spectroscopy, terahertz (THz) transmission characteristics of metal sub-wavelength slit array structure are researched. The results show that surface plasma wave resonance of metal slit array structure can be excited by THz wave, the super-strong transmission phenomena in THz transmis⁃sion waveband is produced by the resonance. For surface plasma resonance effect, very high degree of polariza⁃tion of transmission THz will be produced by the slit structure. The experimental results as benefit references are provided to the production of THz polarization devices.