Optica Open
arXiv.svg (5.58 kB)

Regenerative Terahertz Quantum Detectors

Download (5.58 kB)
posted on 2023-01-11, 23:07 authored by Paolo Micheletti, Jerome Faist, Tudor Olariu, Urban Senica, Mattias Beck, Giacomo Scalari
Because of the ultrafast and photon-driven nature of the transport in their active region, we demonstrate that quantum cascade lasers can be operated as resonantly amplified terahertz detectors. Tunable responsivities up to 50 V/W and noise equivalent powers down to 100 pW/sqrt(Hz) are demonstrated at 4.7 THz. Constant peak responsivities with respect to the detector temperature are observed up to 80K. Thanks to the sub-ps intersubband lifetime electrical bandwidths larger than 20 GHz can be obtained, allowing the detection of optical beatnotes from quantum cascade THz frequency combs.



This arXiv metadata record was not reviewed or approved by, nor does it necessarily express or reflect the policies or opinions of, arXiv.

Usage metrics