Mr. Yuan Han Profile

Yuan Han

at Capital Normal Univ

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Proceedings Article | 6 February 2008 Paper

Transmission characteristics of THz radiation through metal subwavelength holes array

Yuan Han, Yueying Jiao, Cunlin Zhang

Proceedings Volume 6823, 68230S (2008) https://doi.org/10.1117/12.760124

KEYWORDS: Metals, Terahertz radiation, Surface plasmons, Thin films, Transmittance, Dielectrics, Imaging spectroscopy, Physics, Sensors, Millimeter wave imaging

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When terahertz radiation irradiate to the surface of metal sub-wavelength holes array, there will be transmission peak at some frequency because of the surface plasmon resonant. This is the property of selecting transmission of metal sub-wavelength holes array. Many factors affect this property, such as the lattice constant of the array, dielectric of the medium, the thickness of the medium and so on. We mainly discuss the influence of the frequency and intensity of the transmission peak by the thickness of the medium. When the medium film is attached to both sides of the array, we found the changing of the thickness of the medium affect the frequency and intensity of the transmission peak: When the thickness of the medium is increasing, the frequency of the transmission peak becomes lower and the intensity decreases. We also found that when the film is thin (for example 54μm), the intensity of the transmission peak is greater than that of no medium film. This phenomenon shows that attaching thin film to both sides of the holes array will enhance the selecting transmission property.

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