Analysis of the extraordinary transmission properties of arrays of subwavelength holes on a metal film in the terahertz region |
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Authors: | Xiao-Yong He Xiao-Nan Fu Yan-Wei Luo |
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Affiliation: | 1. School of Science , Henan University of Technology , Lianhua Road, Zhengzhou, Henan Province 450001, People's Republic of China xyhethz@hotmail.com;3. School of Science , Henan University of Technology , Lianhua Road, Zhengzhou, Henan Province 450001, People's Republic of China |
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Abstract: | The extraordinary transmission properties of terahertz waves through arrays of subwavelength holes on a metal film have been investigated. The effects of the geometrical parameters and dielectrics filling the hole on transmission properties have been explored. The results show that the resonance peak shifts to long wavelength as the hole width and lattice period constant increase. As the refractive index of the dielectric materials filling the hole increases, the transmittance increases and the resonance peak wavelength changes to low frequency. The phase retardation can be flexibly changed by varying the geometrical parameters and dielectric materials filling in the hole. |
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Keywords: | terahertz surface plasmon subwavelength holes |
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