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A kind of ultra-wide band-pass terahertz filter constructed by drilling annular holes on the metallic strips is proposed. The dispersion curves and S-parameters of the proposed filter are investigated in detail. Compared with the rectangular grooves, the results of the proposed structure demonstrate stronger field confinement and more excellent propagation performance in frequency range from 0.12THz...
A kind of single-mode graphene loaded double ridge plasmon waveguide (GDRW) is proposed here, it demonstrates excellent mode confinement and long propagation length. Tunable propagation properties can be realized by changing either Fermi energy level or geometrical parameters, the structure of GDRW can efficiently suppress interference between adjacent devices. So, it can qualify the integration application...
In this paper, an electron-beam-driven enhanced terahertz (THz) coherent Smith-Purcell radiation (SPR) from the interaction between cylindrical surface wave and annular electron beam within a cylindrical quasi-optical cavity is presented. The results show that the quasi-optical cavity plays a very important role in the coherent SPR resonance and energy feedback which leads to an enhanced coherent...
Electromagnetic diffraction radiation and transmission of subwavelength holes array excited by a line charge are explored. The mechanism of this novel 3D diffraction radiation phenomenon is revealed. Making use of the integral equations with relevant Green's functions, an analytical theory for such system is worked out. The results of calculation based on the theory are well agreed with that of computer...
In the paper, we discuss the possibility of electron beam excitation of surface plasmon in conducting metal. Then, planar perfect structure with subwavelength holes has been proposed. The phenomenon has been proven theoretically and numerically that mimicking surface plasmon wave can be excited and amplified by electron beam. The mechanism of penetration of subwavelength holes array is exploited to...
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