Abstract
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 with wide RF bandwidth. Tunable 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 respect to the detector temperature are observed up to 80 K. Thanks to the ≈ps intersub-band lifetime, electrical bandwidths larger than 20 GHz can be obtained, allowing the detection of optical beatnotes from quantum cascade THz frequency combs. Mehr anzeigen
Persistenter Link
https://doi.org/10.3929/ethz-b-000510542Publikationsstatus
publishedExterne Links
Zeitschrift / Serie
APL PhotonicsBand
Seiten / Artikelnummer
Verlag
American Institute of PhysicsOrganisationseinheit
02510 - Institut für Quantenelektronik / Institute for Quantum Electronics03759 - Faist, Jérôme / Faist, Jérôme
02205 - FIRST-Lab / FIRST Center for Micro- and Nanoscience
Förderung
724344 - On Chip Terahertz Frequency Combs (EC)