We have designed and grown by chemical vapor deposition on silicon chips a conduction-band Ge/SiGe heterostructure supporting resonant quantum cascade detection at 4.7 THz. Vertical-transport devices were fabricated on mesas with grating couplers for normal-incidence illumination. THz radiation from Quantum Cascade Lasers and the blackbody source of a FTIR spectrometer were both measured with the detector operating up to T=30 K. Sub-nanosecond response time is predicted by models of the intersubband transitions of electrons in Ge/SiGe quantum wells.

A Silicon-Germanium Terahertz Quantum Cascade Detector / Gambelli, M., Biffani, A., Talamas-Simola, E., Di Gaspare, L., Capellini, G., Baldassarre, L., Virgilio, M., De Seta, M., Cibella, S., Scalari, G., Ortolani, M.. - (2026). (IRMMW-THZ 2026 CONFERENCE Salt Like City ).

A Silicon-Germanium Terahertz Quantum Cascade Detector

Maria Gambelli;Leonetta Baldassarre;Michele Ortolani
2026

Abstract

We have designed and grown by chemical vapor deposition on silicon chips a conduction-band Ge/SiGe heterostructure supporting resonant quantum cascade detection at 4.7 THz. Vertical-transport devices were fabricated on mesas with grating couplers for normal-incidence illumination. THz radiation from Quantum Cascade Lasers and the blackbody source of a FTIR spectrometer were both measured with the detector operating up to T=30 K. Sub-nanosecond response time is predicted by models of the intersubband transitions of electrons in Ge/SiGe quantum wells.
2026
IRMMW-THZ 2026 CONFERENCE
04 Pubblicazione in atti di convegno::04d Abstract in atti di convegno
A Silicon-Germanium Terahertz Quantum Cascade Detector / Gambelli, M., Biffani, A., Talamas-Simola, E., Di Gaspare, L., Capellini, G., Baldassarre, L., Virgilio, M., De Seta, M., Cibella, S., Scalari, G., Ortolani, M.. - (2026). (IRMMW-THZ 2026 CONFERENCE Salt Like City ).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1776526
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