Programmable terahertz chip-scale sensing interface with direct digital reconfiguration at sub-wavelength scales

Xue Wu, Huaixi Lu and Kaushik Sengupta ()
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Xue Wu: Princeton University
Huaixi Lu: Princeton University
Kaushik Sengupta: Princeton University

Nature Communications, 2019, vol. 10, issue 1, 1-13

Abstract: Abstract The ability to sense terahertz waves in a chip-scale technology operable at room temperature has potential for transformative applications in chemical sensing, biomedical imaging, spectroscopy and security. However, terahertz sensors are typically limited in their responsivity to a narrow slice of the incident field properties including frequency, angle of incidence and polarization. Sensor fusions across these field properties can revolutionize THz sensing allowing robustness, versatility and real-time imaging. Here, we present an approach that incorporates frequency, pattern and polarization programmability into a miniaturized chip-scale THz sensor. Through direct programming of a continuous electromagnetic interface at deep subwavelength scales, we demonstrate the ability to program the sensor across the spectrum (0.1–1.0 THz), angle of incidence and polarization simultaneously in a single chip implemented in an industry standard 65-nm CMOS process. The methodology is compatible with other technology substrates that can allow extension of such programmability into other spectral regions.

Date: 2019
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DOI: 10.1038/s41467-019-09868-6

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