A superconducting bolometer with an on-chip lithographic terahertz antenna has been illuminated by two quantum cascade lasers operating at 2.5 and 4.4 THz. The detector displays a 1.2 mu s time constant, a noise equivalent power of 20 fW/Hz(1/2) and a 60 dB dynamic range. We fabricated a monolithic prototype detector array of five elements. This scalable detector is a suitable candidate for terahertz spectroscopic imaging systems, as it can measure both full illuminator power and strongly attenuated or diffuse reflected signals in subsequent frames.

Wide dynamic range terahertz detector pixel for active spectroscopic imaging with quantum cascade lasers

TREDICUCCI, ALESSANDRO;
2009

Abstract

A superconducting bolometer with an on-chip lithographic terahertz antenna has been illuminated by two quantum cascade lasers operating at 2.5 and 4.4 THz. The detector displays a 1.2 mu s time constant, a noise equivalent power of 20 fW/Hz(1/2) and a 60 dB dynamic range. We fabricated a monolithic prototype detector array of five elements. This scalable detector is a suitable candidate for terahertz spectroscopic imaging systems, as it can measure both full illuminator power and strongly attenuated or diffuse reflected signals in subsequent frames.
Cibella, S.; Ortolani, M.; Leoni, R.; Torrioli, G.; Mahler, L.; Xu, J. H.; Tredicucci, Alessandro; Beere, H. E.; Ritchie, D. A.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/495159
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