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We report experimental radiation pattern measurements of a transverse electromagnetic horn antenna at the millimetric/sub-millimetric frontier (280-350 GHz). The antenna is fed by a monolithically integrated uni-travelling-carrier photodiode illuminated by an optical beatnote (photomixing) at 1.55 μm. The detection is performed using an electronic sub-harmonic mixer and the whole characterization...
Quantum Cascade Lasers (QCL) are probably the most promising sources for Terahertz wave generation. The key issue especially for double metal QCLs is the extraction and the beam shaping of the emitted power. Several solutions have been proposed as possible antennas QCL.
A TEM horn antenna is integrated with a uni-travelling-carrier photodiode. Its radiation pattern is measured from 280 to 540 GHz thanks to a 1.55 μm photomixing set-up and a sub-harmonic mixer. The direction the main lobe shifts to a lower incidence when the frequency is increased.
A narrowband terahertz signal generated by a uni-travelling carrier photodiode (UTC-PD) interfaced with a dual-mode Fabry-Pérot laser diode is demonstrated. A beat tone corresponding to the free spectral range is generated on the UTC-PD, and radiated by a transverse-electromagnetic-horn antenna. All components involved in this experiment operate at room temperature. The terahertz signal at a frequency...
Room temperature homodyne and heterodyne THz detections are reported using an 1.55 mum-based THz source. The first experimental demonstration is a continuous wave terahertz homodyne detection, where THz emission is performed with an InGaAs/InP uni-travelling carrier photodiode monolithically integrated with a horn antenna. The coherent homodyne detection is achieved with an ion-irradiated InGaAs photoconductor...
We report our investigation on realization of 1.55 mum wavelengths sensitive photomixer based on GaAsSb/InP uni-travelling-carrier photodiode. The epitaxial structure and technological steps are described.
Photomixers that consist in a uni-travelling-carrier photodiode (UTC-PD) integrated with a TEM horn antenna (TEM-HA) have been realized and characterized.
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