1.
Opt Express
; 31(10): 15942-15952, 2023 May 08.
Artigo
em Inglês
| MEDLINE
| ID: mdl-37157684
RESUMO
We study the performance of a hot-electron bolometer (HEB) operating at THz frequencies based on superconducting niobium nitride films. We report on the voltage response of the detector over a large electrical detection bandwidth carried out with different THz sources. We show that the impulse response of the fully packaged HEB at 7.5â K has a 3â dB cutoff around 2â GHz. Remarkably, detection capability is still observed above 30â GHz in an heterodyne beating experiment using a THz quantum cascade laser frequency comb. Additionally, the HEB sensitivity has been evaluated and an optical noise equivalent power NEP of 0.8 pW/âH z has been measured at 1â MHz.