TY  - JOUR
AU  - Bueno, J.
AU  - Coumou, P. C. J. J.
AU  - Zheng, G.
AU  - de Visser, P. J.
AU  - Klapwijk, T. M.
AU  - Driessen, E. F. C.
AU  - Doyle, S.
AU  - Baselmans, J. J. A.
PY  - 2014
DA  - 2014//
TI  - Anomalous response of superconducting titanium nitride resonators to terahertz radiation
JO  - Appl. Phys. Lett.
SP  - 192601 (1 to 5)
VL  - 105
KW  - KID
KW  - TiN
KW  - NEP
KW  - disordered superconductors
KW  - inhomogeneous state
AB  - We present an experimental study of kinetic inductance detectors (KIDs) fabricated of atomic layer deposited TiN films and characterized at radiation frequencies of 350 GHz. The responsivity to radiation is measured and found to increase with the increase in radiation powers, opposite to what is expected from theory and observed for hybrid niobium titanium nitride/aluminium (NbTiN/Al) and all-aluminium (all-Al) KIDs. The noise is found to be independent of the level of the radiation power. The noise equivalent power improves with higher radiation powers, also opposite to what is observed and well understood for hybrid NbTiN/Al and all-Al KIDs. We suggest that an inhomogeneous state of these disordered superconductors should be used to explain these observations.
N1  - exported from refbase (https://db.rplab.ru/refbase/show.php?record=1068), last updated on Wed, 09 Dec 2015 16:01:23 -0600
ID  - Bueno_etal2014
ER  -