I V Minin1, O V Minin I S Tseplyaev
This paper presents an investigation of terajets formation by dielectric periodic
structure at terahertz frequencies in effective medium regime (photonic metamaterial). The
dispersions of effective permittivity for periodic structures formed by plastics (ABS, black)
were analytically obtained for both regimes. The study of the interaction of a plane wave and
artificial cubic dielectric on a substrate parallelepiped to form a subwavelength terahertz beams
(terajet) was performed. The results of numerical simulation of S-parameters of structure are
discussed. The subwavelength beam waist of terajets about 0.39λ – 0.41λ were obtained. The
quality factor of terajets are discussed. The results may be applied for creation of methods to
obtain subwavelength beams in the terahertz frequency range, and devices based on them.
These investigations are opening new research lines such as mesoscale focusing devices for
different sensing applications.
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