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Conferences > CLEO_SI > 2022 > STh2N > STh2N.7

Ultrafast Detection of Terahertz Radiation With Regenerative Terahertz Quantum Detector

Paolo Micheletti, Jérôme Faist, Tudor Olariu, Urban Senica, Mattias Beck, and Giacomo Scalari

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Abstract

Quantum cascade lasers can be operated as resonantly amplified terahertz de-tectors with wide RF bandwidth. Responsivities up to 50 V/W and noise equivalent powers down to 100 pW/Hz1/2 are demonstrated at 4.7 THz. Constant peak responsivities with re-spect to the detector temperature are observed up to 80K. The sub-ps intersubband lifetime allows electrical bandwidths as large as 67 GHz as suggested by detection of optical beat-notes from a femtosecond laser.

© 2022 The Author(s)

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