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The following paper presents design and fabrication process of a high gain reflector antenna system carried out within the H2020 M3tera project. This project is focused on the development of a complete microsystem able to work as high rate communication link at D-Band frequencies. The paper presents design and fabrication aspects of two prototypes one fabricated by conventional techniques and the...
In order to develop a practicable extended interaction klystron (EIK) at 0.34 THz, the potential inaccuracy in fabrication process is studied. The influences of tolerance on electric field distribution, ß-value, resonance frequency and impedance are discussed, leading to the acceptable tolerance. Finally the tolerance within 10 um in fabricating the structure of gap is demonstrated acceptable with...
In this work we present, the design, fabrication and characterization of the first continuously varying birefringent q-plate at terahertz frequencies. This q-plate was fabricated by three-dimensional printing. The device works at 150 GHz and it is capable to produce radial, azimuthal and spiral polarization.
Nb5N6 bolometer is a high sensitive terahertz detector at room temperature. The core part of traditional Nb5N6 bolometer is microbridge with a typical size of 3 μm × 12 μm. We have recently proposed a method using electron beam lithography (EBL) instead of UV lithography on fabrication of Nb5N6 micro bridge, which will reduce the size of the micro-bridge one to two orders of magnitude, the minimum...
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...
In this work we present the design and characterization of a quiasi-Wollaston prism polarization splitter for frequencies between 100 GHz and 400 GHz based on form birrefringence. This novel device is simulated using the finite-difference-time-domain method. The experimental results and the numerical simulation show the polarization separation of approximately 23° for this range of frequencies and...
Development of resonant-tunnelling diodes (RTDs) and THz RTD oscillators in the recent years is described. Strategies and concepts to increase their operating frequencies are pointed out, different types of fundamental RTD oscillators outlined. Novel concepts of THz RTD oscillators are indicated.
Metasurfaces based on sub-wavelength patterning have major potential for arbitrary control of the wavefront of light by achieving local control of the phase, amplitude and polarization and allowing greater functionality and more compact devices. The resulting “flat” optical components hold promise to replace refractive and diffractive optics in a large number of applications ranging from camera modules...
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