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The design, fabrication, and characterization of a terahertz transmission blazed-grating made out of paper tissue are presented. The angle dependent intensity observed in a spectroscopy setup is compared with the analytical results and electro-magnetic field scattering simulations. A close agreement between the measurements, simulations and analytical results illustrates the potential of this grating...
We present a novel 3D printed gradient-refractive-index (GRIN) lens for terahertz frequencies. We use polystyrene for the lenses material because it is highly transparent in the terahertz region. This low cost lenses are demonstrated to operate below 800 GHz within the diffraction limit.
In this work we investigate waveguides for 120 GHz which are fabricated by a 3D printer. We use right-angled waveguides with different length to determine the attenuation of the waveguides. Further, we analyze a Y-shaped beam splitting structure.
We present terahertz lenses made of polymeric compounds which provide a better focusing capability and an increased functionality than state of the art lenses made of pure base polymers. This is achieved by employing mixtures between polypropylene and alumina as well as polypropylene and zinc sulfide which allows for a significant increase of the refractive index of the lens base material.
We present a collection of new, low cost quasi-optical devices for the terahertz range. This includes a liquid-filled lens with variable focus length, lenses and transmission gratings made from micro powders, wave plates made from ordinary copy paper, and an electrically tunable notch filter.
We present a fiber-coupled cw THz system for fast and accurate imaging in the field of non-destructive testing. Fibercoupled THz antennas make this system flexible and robust. The time delay is not realized via an optical delay line but by moving the detector antenna along the optical axis (Z-Scan).
Recent years have shown the tremendous growth of electronic use in medical devices. Especially active implants and hearing aids have driven that trend to today's ultra-small devices embedded into the body. While the integrated circuits' features a ever-decreasing critical geometries and surging performance numbers, the delivery format of such advanced chips is seldom providing the engineering teams...
A 300 GHz transmission system, designed for terahertz communication channel modelling and propagation studies, is introduced. It consists of an autarkic transmitter and detector units based on Schottky diode mixer technology. The system performance is characterised with regard to link budget and noise. For demonstration, analogue video signals have been transmitted over distances of up to 22 m.
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