We demonstrate the operation of a miniaturized all-electronic CMOS based THz spectrometer with performances comparable to that of a THz-TDS spectrometer in the frequency range 20 to 220 GHz. The use of this all-electronic THz spectrometer for detection of a thin TiO2 layer and a B. subtilis bacteria film on top of a plasmonic surface is evaluated. The detection of deeply subwavelength layers with comparable performance as a femtosecond laser based THz-TDS spectrometer is demonstrated. The size of the all-electronic spectrometer is 5 cm by 1cm. The high degree of integration of this spectrometer in combination with plasmonics enhanced sensitivity opens the way to bring THz spectroscopy to consumer applications or to the practitioner's office.

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Publisher New York: IEEE
Persistent URL dx.doi.org/10.1109/EuMC.2015.7345915
Berrier, A, Schaafsma, M. C, Gómez Rivas, J, Schäfer-Eberwein, H, Haring Bolivar, P, Tripodi, L, & Matters-Kammerer, M. K. (2015). Electronic THz-spectrometer for plasmonic enhanced deep subwavelength layer detection. In 45th European Microwave Conference (EuMC), 6th - 10th September, Paris, France : Proceedings (pp. 925–928). New York: IEEE. doi:10.1109/EuMC.2015.7345915