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.
Subcarrier frequency -modulated continuous-wave radar in the terahertz range based on a resonant-tunneling-diode oscillator
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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.