Birefringent properties of poly-lactic acid at terahertz range

説明

We report on a drawing-ratio dependence of the refractive index difference between the two optic axes (Δn) of poly lactic acid films in terahertz frequency range. We found that Δη can be controlled in a range of 0–0.04 by changing the drawing ratio. The result shows that we can design a terahertz wave plate with arbitral retardation, which will be useful for establishing polymer-based terahertz optical component with low cost and easy implementation in mass production.

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