TY  - JOUR
AU  - Seliverstov, S.
AU  - Maslennikov, S.
AU  - Ryabchun, S.
AU  - Finkel, M.
AU  - Klapwijk, T. M.
AU  - Kaurova, N.
AU  - Vachtomin, Yu
AU  - Smirnov, K.
AU  - Voronov, B.
AU  - Goltsman, G.
PY  - 2015
DA  - 2015//
TI  - Fast and sensitive terahertz direct detector based on superconducting antenna-coupled hot electron bolometer
T2  - IEEE Trans. Appl. Supercond.
JO  - IEEE Trans. Appl. Supercond.
SP  - 2300304
VL  - 25
IS  - 3
KW  - HEB detector responsivity
KW  - HEB model
KW  - numerical calculations
KW  - numerical model
AB  - We characterize superconducting antenna-coupled hot-electron bolometers for direct detection of terahertz radiation operating at a temperature of 9.0 K. The estimated value of responsivity obtained from lumped-element theory is strongly different from the measured one. A numerical calculation of the detector responsivity is developed, using the Euler method, applied to the system of heat balance equations written in recurrent form. This distributed element model takes into account the effect of nonuniform heating of the detector along its length and provides results that are in better agreement with the experiment. At a signal frequency of 2.5 THz, the measured value of the optical detector noise equivalent power is 2.0 × 10-13 W · Hz-0.5. The value of the bolometer time constant is 35 ps. The corresponding energy resolution is about 3 aJ. This detector has a sensitivity similar to that of the state-of-the-art sub-millimeter detectors operating at accessible cryogenic temperatures, but with a response time several orders of magnitude shorter.
UR  - https://doi.org/10.1109/TASC.2014.2372171
DO  - 10.1109/TASC.2014.2372171
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=953), last updated on Thu, 13 May 2021 00:21:54 -0500
ID  - Seliverstov_etal2015
ER  -