This technique improves signal-to-noise ratio by 10 dB per decade in plasmonic heterodyne terahertz spectrometers, suggesting enhanced spectral data accuracy.
We present a lock-in detection technique that enhances the signal-to-noise ratio of captured spectra in plasmonic heterodyne terahertz spectrometers, achieving a noise reduction rate of 10 dB per decade of integration time while preserving spectral information.
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Tsao et al. (2025) studied this question.
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