A single RTD-based 280 GHz system achieves 5 μm displacement sensitivity and resolves 12.5-50 μm polymer thicknesses using self-mixing radar signals.
Photonic Radar for 3D Imaging: From Millimeter to Terahertz Waves
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Micrometer-scale displacement and thickness sensing using a single terahertz resonant-tunneling diode
A single RTD-based 280 GHz system achieves 5 μm displacement sensitivity and resolves 12.5-50 μm polymer thicknesses using self-mixing radar signals.