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The propagation of THz waves on a single metallic strip will be presented. The properties and basic applications of this Planar Goubau- Sommerfeld Line (PGSL) will be shown. For example one can realize filters in different ways. The topology of this line is well suited for the excitation of metamaterial's unit cell like split ring resonators (SRR) [1]. We can also take benefit of the propagation on...
An application of terahertz metamaterials as transducer elements for chemical sensors is reported. A planar array of split-ring resonators was formed from gold on the surface of silicon wafer and coated by polyaniline. Analyte binding to polyaniline leads to well measurable changes of the resonance frequency.
In this paper, Smith-Purcell effect, which utilizes metallic grating and electron bunches, was investigated for a new device of terahertz (THz)-wave generation. Femtosecond electron bunches induced multimode THz-wave at a frequency of <0.7 THz.
The Smith-Purcell radiation (SPR) in metallic metamaterial grating is studied theoretically. This metallic metamaterial is a one-dimensional array of slits with sub-wavelength period perforated on a perfect metallic film, which supports discrete guided modes in presence of convective electron bunch near its surface. It is also found that SPR intensity is enhanced when guided modes couple with diffraction...
We developed a new chemical procedure for the fabrication of TiO2 dielectric microspheres. We also proposed an elegant way to evaluate of the effective dielectric permittivity and magnetic permeability of single-layer films made of independent resonators. The resonant magnetic response of was observed in the THz range. Experimental results are in agreement with simulations.
Recently, considerable studies have shown that plasmon induced transparency (PIT) effect can be realized by metamaterials via destructive interference between different resonance modes. Here we present a few recent developments of PIT research in terahertz metamaterials.
We present two designs of planar terahertz metamaterials for strain sensing. A series of resonance frequency shifts are obtained with differing gap widths when the sensor is under mechanical compression. The subwavelength metamaterial structures exhibit a high-Q resonance resulting in a good sensitivity to mechanical deformation. Because of the penetrability and relatively high spatial resolution...
We present a metamaterial-based sensor for use at terahertz (THz) frequencies that is suitable for the measurement of the thickness and the refractive index of a dielectric sample material. The sensor is designed to operate in reflection geometry in the frequency range between 1 THz and 1.6 THz. Deep-subwavelength sample thicknesses as small as 1/16000 of the operating wavelength can be resolved as...
We use fibre-drawing methods to make large quantities of indium wire arrays embedded in polymer. By controlling the size and spacing of the wires in the arrays, we fabricate electric metamaterials with plasma frequencies in the THz through to the mid-IR. We also discuss the limitations of this process using the current choice of materials.
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