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We present an improved method for measuring power at ∼100 GHz and above using a large-area (5-mm diam) LiTaO3 pyroelectric detector. The pyroelectric element is packaged in a lid-free TO-5 can, which in turn is mated to one end of a 1/2-inch-diam brass tube whose opposite end is flared for improved coupling efficiency. This “light-pipe”-like arrangement is cross-calibrated against a thermistor-based...
Using a reflection-based pulsed THz imaging system built upon our ErAs:GaAs photoconductive switch and a gated receiver, we quantify image quality at different detection bands (centered at 100, 400, and 600 GHz). Zero-bias Schottky diode detectors mounted in various waveguide sizes are used to tune the operational frequency bands of the imaging system, while the rest of the imaging system remains...
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