10:30 〜 10:45
▼ [22a-H135-7] Experimental Evaluation of Terajet Produced by a Dielectric Cuboid in the THz Region
キーワード：terajet,dielectric cuboid,electro-optic sensing
A terajet, i.e., a jet with a subwavelength focusing performance in the terahertz (THz, 0.1-10 THz) region, has been attracting a lot of research interests owing to the possibility to enhance the resolution in imaging applications. Although many numerical studies have been reported, the evaluation of the terajet generated from a 3D dielectric cuboid has not yet been verified experimentally in the THz region. Recently, we have proposed a THz-wave measurement system, based on the non-polarimetric self-heterodyne electro-optic (EO) detection technique, to visualize the THz waves in the near-field region. Using this system, we demonstrate the experimental evaluation of the generation of the terajet from a 3D Teflon cuboid with a refractive index of 1.46 at 125 GHz for the first time. The experimental results agree well with the simulation results, and show the enhancement of THz power of about 7.4 dB the incident plane wave and full width at half maximum of 1.44 mm (0.6 wavelength) at a distance of 0.5 wavelength from the cuboid.