High double-refraction elliptical porous terahertz waveguide and preparation method thereof

Abstract

The invention discloses a high double-refraction elliptical porous terahertz waveguide which is mainly used for the fields of maintaining single polarization transmission and sensing terahertz polarization of a terahertz wave. In order to overcome the defects of difficult waveguide preparation and fixed and unadjustable double-refraction coefficient in the prior art, an elliptical air hole array is allotted on the cross section of the high double-refraction elliptical porous terahertz waveguide; and furthermore, the external boundary of the cross section of the waveguide is also in an ellipse. The invention has the advantages of low transmission consumption, high and adjustable double-refraction coefficient, low preparation cost and easy utilization.

Description

technical field [0001] The invention relates to a porous waveguide fiber for transmitting terahertz waves, which is mainly used in the single polarization maintaining transmission of terahertz waves and the field of terahertz polarization sensing. Background technique [0002] Due to its great application value in sensing, communication, security inspection, national defense, materials, biology, medicine and other fields, terahertz technology has become a hot research field that researchers from all over the world are generally concerned about. Terahertz waveguides are of great value for the miniaturization and flexibility of terahertz systems. Since almost all materials have strong absorption of terahertz radiation, a large part of the work has focused on low-loss terahertz waveguides. For example, metal microwire waveguides, sub-wavelength plastic waveguides, and hollow photonic crystal waveguides can all reduce losses to a certain extent. Recently, several polymer porou...

AI Technical Summary

Problems solved by technology

However, the research on birefringent terahertz waveguides is still insufficient, and only a few research results have been reported. However, they are of great value for polarization terahertz transmission, filtering, sensing, etc., and are worthy of attention

In 2008, S. Atakaramians and their collaborators proposed a method to introduce a rectangular hole into a porous terahertz waveguide to achieve birefringence. However, considering the surface tension of the material, it is difficult to ensure the shape of the rectangular hole in the fabrication. The waveguide quite difficult to prepare

Moreover, the birefringence coefficient of this birefringent terahertz waveguide is fixed but not adjustable, and its specific application is also limited.

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