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We present our investigations of solar cell mini modules and metal interconnects using terahertz time-domain spectroscopic imaging. It was demonstrated, that time-domain data can be used to reveal the thickness variation of encapsulating layers and height difference of metal contact surfaces in a vicinity of shunts.
Zone plates with integrated band-pass filters were designed numerically via finite-difference time-domain technique and demonstrated experimentally at 0.76 THz frequency applying Fourier spectroscopy and optically pumped molecular terahertz laser.
A bow-tie InGaAs with broken symmetry has been designed for terahertz detection at room temperature. An active part of the detector consists of a two-dimensional electron gas which is heated non-uniformly with incident radiation. Main detector performances are operation in a passive scheme, flat frequency response up to 1 THz, the voltage sensitivity of about 5 V/W, the noise equivalent power of roughly...
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