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In this paper, squeezing and tunneling of spoof surface plasmon polaritons (SSPPs) are realized by introducing an effective epsilon-near-zero (ENZ) material between two plasmonic waveguides constructed from dielectric filled rectangular waveguide etched with deep sub-wavelength periodical transverse slots on the upper wall. This simple design holds great promise in significantly increasing the propagation...
Large metallic losses and short propagation lengths associated with surface plasmons (SPs) have long been considered as the obstacles which severely limit the practical applications of surface plasmonic waveguides. In this paper, we introduce the concept of dielectric spoof SPs (SSPs) and show that subwavelength high-contrast gratings (HCGs) offer a route to effectively suppress the losses and hence...
In this work, a smooth bridge between a traditional microstrip line and a two parallel metallic strips drilled with symmetrical grooves is designed to achieve ultra-wideband low-pass filtering characteristics. Numerical simulations on the S-parameters demonstrate the good performance in the whole pass band. This kind of plasmonic filter poses potential applications in developing advanced plasmonic...
In this work, a band-pass plasmonic filter composed of a traditional microstrip line and a gradient metallic strip drilled with subwavelength holes is proposed. Numerical simulations on the S-parameters demonstrate the good performance in the pass band. This kind of plasmonic filter poses potential applications in developing advanced plasmonic integrated circuits in the microwave and terahertz frequencies.
A simple band-notched coplanar waveguide (BNCPW) is presented in this paper, which is designed based on the idea that a defect mode in the bandgap between the fundamental and higher modes of the spoof surface plasmon polaritons (SSPPs) can be introduced to form a stopband. The BNCPW, a quite simple structure, consists of a coplanar waveguide (CPW) and a periodic corrugated metallic strips on the back...
In this work, we propose a smooth transition structure from a coaxial waveguide to a helically plasmonic waveguide, which can achieve high-efficiency guiding and focusing of spoof surface plasmon polaritons on the conical metal wire decorated with periodically helical grooves. Numerical simulations of the proposed structure show that the amplitude of surface electric field at the conical endpoint...
A rectangular waveguide (RW) to domino plas-monic waveguide (DPW) converter in X-band (8.2–12.4GHz), which is based on the high-efficiency conversion between guided waves and domino plasmon polaritons (DPPs), is proposed in this work. A matching transition composed by gradient domino arrays and flaring upper wall to match the wave number and impedance between the RW and DPW has been presented and...
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