Design of terahertz wire-grid polarizer of laminated parallel plates on cyclo olefin polymer films for high extinction ratio less than 10&lt;sup&gt;&amp;#x2212;6&lt;/sup&gt;

Kishi, Yudai; Nagai, Masaya; Young, John C.; Takano, Keisuke; Asai, M.; Hangyo, Masanori; Suzuki, Takao

doi:10.1109/irmmw-thz.2013.6665904

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2014

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“…For example, a robust and low-cost wire-grid parallel-plate polarizer with an extinction ratio \ -60 dB and a high transmittance was designed and presented in [19]. A parallel plate also acts as an artificial dielectric material [20][21][22][23][24] and can be used as a path-length lens in the microwave band [20].…”

Section: Introductionmentioning

confidence: 99%

Terahertz path-length lens composed of oblique metal slit array

et al. 2014

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Need for high-performance and sophisticated optical devices in the terahertz wave band is growing rapidly with terahertz technological progress. This paper presents a lens in the terahertz wave band based on phase control using an oblique metal slit array. A convex oblique slit array can produce a focusing effect. This focusing effect is confirmed by full-wave analysis for the designed terahertz path-length lens. The effective refractive index computed from the full-wave analysis is consistent with analytical expressions and changes from 1.00 to 1.56 with the angle of the metal slit array. Full-wave analysis also confirms that the lamination errors of the path-length lens have limited influence on the focusing effects. The robustness of the lens design is essential for its industrial applications to terahertz optical devices.

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